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FABER-CASTELL » MINI-POCKET «
( 10 cm Scales )
A.W.Faber-Castell, Stein bei Nuernberg / Germany (1941)
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S C A L E S of the F.-C. » MINI-POCKET « Model 74/91
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Front Side Back Side
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( 0 ... 10 cm Ruler )
A X2
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B X2 S sin(0.01X); sin(0.1X)
L lgX
C X T tan(0.1X)
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D X
R E M A R K S : ( 1° = 60' ; 1' = 60" )
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The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS
S keyed to A/B ; T keyed to C/D
This MINI-POCKET SR is made of pear wood with scales on
celluloid veneer. It came in a leather case - and it was
NOT A TOY! Ref. to the print on the nice cover, it was a
gift from the famous German »SKF« ball-bearing company.
Historical Remarks ...
Because the original cursor was missing, there is a home-
made of plastic. The hairline is made with a »X-ACTO« and
colored with a marker - and for "contrast" the edges too.
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Production Code = 41_6 = June 1941