A W Faber "Castell" 390

(12.5cm Scale Pocket rule, Enhanced Mannheim)

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A W Faber "Castell" 390 (1934)
Image
Image Summary
System: Enhanced Mannheim
Specialization: -
Type: Closed frame
Material: Pearwood
Facings: Celluliod
Scale Length: 12.5cm No of Scales: 9
Front Length: 152mm Front Width: 26mm
Language: German Origin: -
Date: 1934, July
Features/Notes: Pocket rule
Scales (colours as shown)
Front: A [ B, CI, C ] D | K Back: [ S, L, T ]
Labels Left: - Labels Left: All, as scales
Labels Right: - Labels Right: All, as scales
Style: Railway track Typeface: Sans-serif
Extensions: A, B, CI, C & D beyond 1 & 10 in red Decimals: As units between 1 & 2 on CI, C & D
Gauge Marks: p (3.14) on A, B, C & D
C (1.13) on C
C1 (3.57) on C
Rulers: cm on top 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) - 152 x 32 x 9
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) - 13
Cursor: Aluminium frame, glass pane.
Tab on bottom runner with index for K scale.
Square window.
Left end riveted steel spring on top runner.
Single central full length hairline.
Width x Height (mm) - 28 x 31
Printing (colours as shown)
Stock: "390" + scales logo + "A.W.FABER" + ""CASTELL"" between lying castles towards the right end of well above the split, sans-serif.
Slide: -
Cursor: -
Labels: On back, paper table featuring conversions and mathematical and physical constants.
Instructions
None
Box (colours as shown)
Style: Travel case L x W x D mm: 168 x 42 x 15
Material: Leather Colour: Brown
Construction: Fold over flap.
Printing: None
Labels: None
Detail Images
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