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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU452Linear
N4053-3F
4125
n/a
Polyphase Mannheim AdjustableKeuffel & EsserUSA
339C
Engine divided celluloid laminated mahogany
"10"
1921
C4

Notes: K scale moved from lower edge to front face below D scale. Centimeter scale added to lower edge. Notations moved above the A scale. N added to model number (N over <4053-3F>) and moved to right side of slide. Scale labels moved to left side.

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