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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU263Linear
4061T
4168
1
Duplex TrigKeuffel & EsserUSA
110
Engine divided celluloid laminated mahogany
"6"
1909
C5

Notes: "Metal framed glass "clamshell" indicator. L scale on top edge and S & T trig scales on slide front and back respectively. Company notation on front below D scale and patent notations on back below D scale. T added to model number (i.e. <4061T>."

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