K&E 68 1617 (old 4053-3s) Mannheim Polyphase

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Country of manufacture: USA,            Date of manufacture: ____, Serial No.: 371928
Overall length: 27.8 cm,          Width: 3.5 cm,           Weight: 60.0 gms
Materials: Celluloid laminate over mahogany
Cursor: 1.9 X 3.7 X 0.5 cms; plastic runners, metal framed plastic lens; lines = single hairline
Scales: 11
Front: 10 in // A [B, CI, C] D, K \\ 25 cm
Slide Back:      [S, L, T
Gauge Marks: [π, 785, //, / ]
Back: physical constants, conversion factors
Condition: C2 (Mint, but no manual))
Came with: Original green box, orange leather case, marketing literature, "How to Take Care of..." booklet

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