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STERLING POCKET ( 5" / 12.5 cm Scales )
STERLING PLASTIC CO., Mountainside, New Jersey / USA (1965)
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SCALES of the S T E R L I N G Model 587 P O C K E T
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Front Side Back Side
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A X2
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B X2 S sin(0.01X); sin(0.1X)
CI 1/X L lgX
C X T tan(0.1X)
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D X
K X3
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 ; T keyed to D
To use the Back-Scales, the slider has to be turned.
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This POCKET SR was a gift from » THE DOW CHEMICAL COMPANY «. It
came in a soft plastic case together with an instruction sheet.