Flying Fish 1005 Stadia Rule

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Country of manufacture: China,            Date of manufacture: ____
Overall length: 33.0 cm,          Width: 4.8 cm,           Weight: 100.3 gms
Materials: all plastic; glued-on end braces
Cursor: 3.8 X 5.9 X 1.0 cms; all plastic, adjustable; lines = single hairline on front, three on back
Scales: 22, no extensions
Front: Ln_-1, Ln₀, Ln_1,, A [B, 1-cosα, ½sin2α ] D, Lg, 1/60
Back: K, AI, A [ B, tgα, sinα & tanα, sinα, C ] D, 常数, DI, P
Gauge Marks: [π, R, e, ρ', ρ'', 1/ρ', 1/ρ'', M (4343), ρ^g, d; many marks on the Earth Constants Scale; unknonw mark 'M' between the 1-cosα scale and the ½sin2α scale, located immediately under 2° 29' approx 40'' on the 1-cosα scale. ]
Condition: C2-C3 (Mint to very minimal signs of use)
Came with: Original plastic box/case, instructions in Chinese
Notes: The Earth Constants (常数) Scale is explained on the ISRM's Slide Rule Terms and Glossary Section, see http://sliderulemuseum.com/SR_Terms.htm#Top.

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