Dietzgen 1759-B Mannheim Phillips

Country of manufacture: USA,            Date of manufacture: ____
Overall length: 27.5 cm,          Width: 3.6 cm,           Weight: 63.1 gms
Materials: Celluloid laminate over mahogany
Cursor: 2.9 X 3.3 X 0.6 cms; metal framed glass lens; lines = single hairline
Scales: 10
Front: 10 in // A [ B, R, C ] D || K
Slide Back: S, L, T
Gauge Marks: [π, 785, ' (1970), '' (1182) ]
Back: physical constants, conversion factors
Condition: C1 (Mint w/all extras, some extras not necessarily in mint condition))
Came with: Original box, black cardboard case, manual