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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU600Linear
4041 Prototype
??
n/a
Mannheim AdjustableKeuffel & EsserUSA
22
Engine divided celluloid laminated mahogany
"10"
c. 1899 - 1900
C6

Notes: "Prototype of the model 4041. Likely to test out the adjustable upper stator which was patent June 5, 1900. There are 4 screws (round heads in rough cut square holes) instead of 3 on 4041. Also thumb notches on both ends that are larger than on the 4041."

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