Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU621Linear
4070-3
4563
2
Polyphase Duplex TrigKeuffel & EsserUSA
651286
Engine divided celluloid laminated mahogany
"10"
1951
C4

Notes: Horizontal lines removed from between D & L scale on front and K & A and D & DI scales on reverse. added above K&E stylized logo and K&E removed from right end of slide reverse.

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