KEUFFEL & ESSER, New York / USA » DORIC 10000 « (1950)
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Copyright by ECCO CO. 1946
S C A L E S of the P O C K E T Model » DORIC 10000 «
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Front Side [ inverse / RED ] Back Side
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K X3
A X2 DF πX
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B X2 CF πX
ST arc(0.01X) [CI] [1/X]
S sin(0.1X) C X
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D X D X
T tan(0.1X) L lgX
R E M A R K S : ( 1° = 60' ; 1' = 60" )
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The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS
This Plastic Pocket-SR came with a brown leather case in a
green K+E Cardboard Box. There is no »K+E« on the SR, but
(1st) the label on the box says "DORIC K+E 10000"
(2nd) the "10000" is on the SR's slider
(3rd) one cursor glass was broken and could be replaced
with an original K+E ( # 682188 ) window
Later the POCKET K & E Model 681555 »DORIC« was found ...
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SN = 034364
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