A W Faber "Castell" 345

(25cm Scale, System Hohenner)

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A W Faber "Castell" 345 (1927)
Image
Image Summary
System: System Hohenner (DRGM 527555, 1912)
Specialization: Barometric
Type: Closed frame
Material: Pearwood
Facings: Celluliod
Scale Length: 25cm No of Scales: 8
Front Length: 280mm Front Width: 27.5mm
Language: English Origin: Bavaria
Date: 1927, February
Features/Notes: Third party sprung steel cursor cover measuring approx 23 x 32 x 7mm ,stamped with "COVER FOR SLIDE RULE CURSOR" "PATENT APPLIED FOR" "E & S.B.W LTD _ L"
Scales (colours as shown)
Front: A [ B, C ] D, 1 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: inch on top edge
cm on bottom edge
Features/Notes: 1 - Special barometric Dr. Hohenner scale from -20 to +40 below D scale on right hand end from approx 7.4 to 9.2 with zero at approx 8.02.
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 34 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) - 29 x 30
Printing (colours as shown)
Stock: "345 * 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 DR. HOHENNER" on front bottom rail to the left of the special scale, sans-serif.
"Quot. +1" and "Prod. -1" on the left and right ends respectively of the front lower stock rail, sans-serif.
"MADE IN BAVARIA" on the top centre of the back, sans-serif.
Slide: -
Cursor: -
Labels: On back, paper table featuring conversions and mathematical and physical constants.
Instructions
None
Box (colours as shown)
Style: Rounded L x W x D mm: 290 x 45 x 19
Material: Cardboard Colour: Black
Construction: 2 part, internal sleeve join.
Faced.
Metal braced ends.
Poor condition.
Printing: "A.W. FABER" and underneath "D.R.P. No 206428" on the front.
Labels: Large red/green on white advertising label on back, very damaged and faded/discoloured, barely visible.
Ends damaged and taped.
Detail Images
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