A W Faber "Castell" 375

(25cm Scale, System Rietz)
Examples: 1921, 1926, 1933, 1934

Version Comparison
Three versions of the model from early to late fully detailed below, differences summarised as follows:
Click on a column heading to jump down to version images and detailed description.
1921 1926 1933 1934
Front Length: 280mm 295mm
Scale Style: Double railway Railway track
Slide Tension: - Adjustment screws
Slide Back Scales: [ S, L, T ] [ S, S&T, T ]
Slide Back Scales Left Labels: All, as scales - All, as scales
Typeface: Serif Sans-serif
Scale Extensions: - Red
p Gauge Mark: A & B A, B, C & D
C & C1 Gauge Marks: C & D C
r" & r' Gauge Marks: - C & D
Measure in Well: - cm
Width x Height: 33 x 9mm 34 x 11mm
Cursor Form: Normal Sliding magnifier Normal
Cursor Spring: Centre sprung Left end sprung
"*" or "Scales": * Scales
DRP Numbers: Full, well centre below split Abbreviated, well right below split
Tracking Nmemonics: Short text -
Origin Labelling: - Back centre bottom
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A W Faber "Castell" 375 (1921)
Image
Image Summary
System: Rietz
Specialization: -
Type: Closed frame
Material: Pearwood
Facings: Celluliod
Scale Length: 25cm No of Scales: 9
Front Length: 280mm Front Width: 32mm
Language: German Origin: -
Date: 1921, July
Features/Notes: -
Scales (colours as shown)
Front: K, A [ B, C ] D, L Back: [ S, L, T ]
Labels Left: - Labels Left: All, as scales
Labels Right: - Labels Right: All, as scales
Style: Railway track (double) Typeface: Serif
Extensions: - Decimals: As units between 1 & 2 on C & D
Gauge Marks: p (3.14) on A & B
M (1/p=0.318) on A & B
C (1.13) on C & D
C1 (3.57) on C & D
Rulers: cm on top edge
cm on bottom edge
Features/Notes: -
Construction
Stock: 2 part split stock joined with steel springs (DRGM 522689, 1912; DRGM 452965, 1911).
Braced with longitudinal metal strips (DRP 206428, 1908).
Left and right viewing cutouts with index marks, in back for reverse of slide.
Bevelled top edge, square bottom edge.
High cursor grooves both cut parallel to front face.
Shallow rebate in back .
Front, well, top and bottom edges celluloid faced, secured with wooden pins (DRGM 371190, 1908).
Length x Width x Height (mm) - 280 x 38 x 10
Slide: Double sided
Braced with longitudinal metal strips (DRP 206428, 1908)
Celluliod faced on both sides, secured with wooden pins (DRGM 371190, 1908)
Front face width (mm) - 12
Cursor: Aluminium frame, glass pane.
Square window.
Centre riveted steel spring on top runner.
Single central full length hairline.
Width x Height (mm) - 33 x 35
Printing (colours as shown)
Stock: "375 * A.W.FABER" + ""CASTELL"" between lying castles in the centre of well above the split, sans-serif.
"D.R. PATENT. No 206428." in the centre of well below the split, sans-serif.
"SYSTEM RIETZ" in the well above the split towards the right, sans-serif.
"Quot. +1" and "Prod. -1" on the left and right ends respectively of the front lower stock rail, sans-serif.
Slide: -
Cursor: -
Labels: On back, paper table featuring conversions and mathematical and physical constants, very worn.
Instructions
None
Box (colours as shown)
Style: Square L x W x D mm: 320 x 50 x 23
Material: Cardboard Colour: Black
Construction: 2 part, internal sleeve join.
Faced.
Printing: "A.W. FABER" and underneath scales logo then "D.R.P." beneath that on the front.
Round indentations on the front either side of the opening.
Labels: None seen (ends damaged and taped).
Detail Images
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A W Faber "Castell" 375 (1926)
Image
Image Summary
System: Rietz
Specialization: -
Type: Closed frame
Material: Pearwood
Facings: Celluliod
Scale Length: 25cm No of Scales: 9
Front Length: 280mm Front Width: 32mm
Language: English Origin: Germany
Date: 1926, March
Features/Notes: Magnifying cursor with sliding half-cylinder lens.
Scales (colours as shown)
Front: K, A [ B, C ] D, L Back: [ S, S&T, T ]
Labels Left: - Labels Left: -
Labels Right: - Labels Right: All, as scales
Style: Railway track (double) Typeface: Serif
Extensions: - Decimals: As units between 1 & 2 on C & D
Gauge Marks: p (3.14) on A & B
M (1/p=0.318) on A & B
C (1.13) on C & D
C1 (3.57) on C & D
Rulers: inch on top edge
cm on bottom edge
Features/Notes: -
Construction
Stock: 2 part split stock joined with steel springs (DRGM 522689, 1912; DRGM 452965, 1911).
Braced with longitudinal metal strips (DRP 206428, 1908).
Left and right viewing cutouts with index marks, in back for reverse of slide.
Bevelled top edge, square bottom edge.
High cursor grooves both cut parallel to front face.
Shallow rebate in back .
Front, well, top and bottom edges celluloid faced, secured with wooden pins (DRGM 371190, 1908).
Length x Width x Height (mm) - 280 x 38 x 10
Slide: Double sided
Braced with longitudinal metal strips (DRP 206428, 1908)
Celluliod faced on both sides, secured with wooden pins (DRGM 371190, 1908)
Front face width (mm) - 12
Cursor: Aluminium frame, glass pane.
Magnifying cursor with sliding half-cylinder lens (DRP 450304, 1926).
Lens width x height x depth (mm) - 13 x 35 x 5,with beveled ends.
Angled steel(?) flanges attached to the top and bottom runners with 3 rivets each, to hold the lens and allow it to slide.
Square window.
Left end riveted steel spring on top runner.
Three eqidistant full length hairlines.
Width x Height (mm) - 41 x 37
Printing (colours as shown)
Stock: "375 * A.W.FABER" + ""CASTELL"" between lying castles in the centre of well above the split, sans-serif.
"D.R. PATENT. No 206428." in the centre of well below the split, sans-serif.
"SYSTEM RIETZ" in the well above the split towards the right, sans-serif.
"Quot. +1" and "Prod. -1" on the left and right ends respectively of the front lower stock rail, sans-serif.
Slide: -
Cursor: "S" stamped on the front of the top runner above the left hairline.
"S" stamped on the front of the top runner above the centre hairline.
"MADE IN BAVARIA" stamped on the back of the top runner, sans-serif.
Labels: On back, paper table featuring conversions and mathematical and physical constants, worn.
Instructions
None
Box (colours as shown)
Style: Not present L x W x D mm: -
Material: - Colour: -
Construction: -
Printing: -
Labels: -
Detail Images
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A W Faber "Castell" 375 (1933)
Image
Image Summary
System: Rietz
Specialization: -
Type: Closed frame
Material: Pearwood
Facings: Celluliod
Scale Length: 25cm No of Scales: 9
Front Length: 295mm Front Width: 32mm
Language: English Origin: Bavaria
Date: 1933, November
Features/Notes: -
Scales (colours as shown)
Front: K, A [ B, C ] D, L Back: [ S, S&T, T ]
Labels Left: - Labels Left: All, as scales
Labels Right: - Labels Right: All, as scales
Style: Railway track Typeface: Sans-serif
Extensions: A, B, C & D beyond 1 & 10 in red Decimals: As units between 1 & 2 on C & D
Gauge Marks: p (3.14) on A, B, C & D
M (1/p=0.318) on A & B
C (1.13) on C
C1 (3.57) on C
r" (2063) on C & D
r' (3438) on C & D
Rulers: inch on top edge
cm on bottom edge
cm continuation in well above the split for longer measurements
Features/Notes: -
Construction
Stock: 2 part split stock joined with steel springs (DRGM 522689, 1912; DRGM 452965, 1911).
Braced with longitudinal metal strips (DRP 206428, 1908).
Left and right viewing cutouts with index marks, in back for reverse of slide.
Bevelled top edge, square bottom edge.
High cursor grooves both cut parallel to front face.
Shallow rebate in back .
Front, well, top and bottom edges celluloid faced, secured with wooden pins (DRGM 371190, 1908).
Length x Width x Height (mm) - 295 x 39 x 11
Slide: Double sided
Braced with longitudinal metal strips (DRP 206428, 1908)
Celluliod faced on both sides, secured with wooden pins (DRGM 371190, 1908)
Front face width (mm) - 12
Cursor: Aluminium frame, glass pane.
Extra wide.
Square window.
Left end riveted steel spring on top runner.
Single central full length hairline.
Width x Height (mm) - 41 x 35
Printing (colours as shown)
Stock: "375" + scales logo + "A.W.FABER" + ""CASTELL"" between lying castles in the centre of well below the split, sans-serif.
"D.R.P." in the well below the split towards the right, sans-serif.
"SYSTEM RIETZ" in the well below the split on the right, sans-serif.
"MADE IN BAVARIA." on the bottom centre of the back, sans-serif.
Slide: -
Cursor: "MADE IN BAVARIA" stamped on the bottom edge, sans-serif.
"2" stamped on the top edge
Labels: On back, paper table featuring conversions and mathematical and physical constants.
Instructions
None
Box (colours as shown)
Style: Square L x W x D mm: 305 x 50 x 20
Material: Cardboard Colour: Black
Construction: 2 part, internal sleeve join.
Faced.
Printing: scales + "A.W. FABER" logo then underneath reverse printed "CASTELL", then underneath spaced out "D.", "R." and "P." on the front.
Round indentations on the front either side of the opening.
Labels: "375" with "MADE IN BAVARIA" smaller underneath on black, on right end.
Detail Images
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A W Faber "Castell" 375 (1934)
Image
Image Summary
System: Rietz
Specialization: -
Type: Closed frame
Material: Pearwood
Facings: Celluliod
Scale Length: 25cm No of Scales: 9
Front Length: 295mm Front Width: 32mm
Language: English Origin: Bavaria
Date: 1934, June
Features/Notes: -
Scales (colours as shown)
Front: K, A [ B, C ] D, L Back: [ S, S&T, T ]
Labels Left: - Labels Left: All, as scales
Labels Right: - Labels Right: All, as scales
Style: Railway track Typeface: Sans-serif
Extensions: A, B, C & D beyond 1 & 10 in red Decimals: As units between 1 & 2 on C & D
Gauge Marks: p (3.14) on A, B, C & D
M (1/p=0.318) on A & B
C (1.13) on C
C1 (3.57) on C
r" (2063) on C & D
r' (3438) on C & D
Rulers: inch on top edge
cm on bottom edge
cm continuation in well above the split for longer measurements
Features/Notes: -
Construction
Stock: 2 part split stock joined with steel springs (DRGM 522689, 1912; DRGM 452965, 1911).
Braced with longitudinal metal strips (DRP 206428, 1908).
Tension adjustment screws in bottom edge (DRP 365637, 1922).
Left and right viewing cutouts with index marks, in back for reverse of slide.
Bevelled top edge, square bottom edge.
High cursor grooves both cut parallel to front face.
Shallow rebate in back .
Front, well, top and bottom edges celluloid faced, secured with wooden pins (DRGM 371190, 1908).
Length x Width x Height (mm) - 295 x 39 x 11
Slide: Double sided
Braced with longitudinal metal strips (DRP 206428, 1908)
Celluliod faced on both sides, secured with wooden pins (DRGM 371190, 1908)
Front face width (mm) - 12
Cursor: Aluminium frame, glass pane.
Extra wide.
Square window.
Left end riveted steel spring on top runner.
Single central full length hairline.
Width x Height (mm) - 41 x 35
Printing (colours as shown)
Stock: "375" + scales logo + "A.W.FABER" + ""CASTELL"" between lying castles in the centre of well below the split, sans-serif.
"D.R.P." in the well below the split towards the right, sans-serif.
"SYSTEM RIETZ" in the well below the split on the right, sans-serif.
"MADE IN BAVARIA." on the bottom centre of the back, sans-serif.
Slide: -
Cursor: "MADE IN BAVARIA" stamped on the bottom edge, sans-serif.
"2" stamped on the top edge
Labels: On back, paper table featuring conversions and mathematical and physical constants.
Instructions
None
Box (colours as shown)
Style: Square L x W x D mm: 310 x 45 x 17
Material: Cardboard Colour: Black
Construction: 2 part, internal sleeve join.
Faced.
Printing: scales + "A.W. FABER" ""CASTELL"" logo on the front.
Round indentations on the front either side of the opening.
Labels: "375" with "MADE IN BAVARIA" smaller underneath on black, on right end.
Detail Images
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