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