Ding Feng 5471 Hyperbolic

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Country of manufacture: China,            Date of manufacture: ____
Overall length: 32.3 cm,          Width: 5.3 cm,           Weight: 164.3 gms
Materials: celuloid laminate over bamboo, metal end plates
Cursor: 3.8 X 6.8 X 1.2 cms; plastic runners holding metal-framed glass lens, adjustable; lines = single hairline on both front and back
Scales: 26, no extensions
Front: 2D, L, K, A [ Tan, Sin, H', CI, C ] D, Th, Sh1, Sh2
Back: LL1I, LL2I, LL3I, DF [ CF, CIF, H, CI, C ] D, LL3, LL2, LL1
Gauge Marks: [π, e, ρ, R ]
Condition: C4 (Minimal signs of use)
Came with: Origial black leather and cardboard case

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