Sewing Machine Research
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International Sewing Machine Collectors' Society

Singer Model 12

The Singer Standard Model 12 began in 1865; later models had a rectangular base.

See here for an article about an Industrial version of the 12K.

From 1870 it was available for semi-industrial use with a longer arm as the Model 13.

Singer Model 12K Hand-Crank Sewing Machine
Singer Model 12K Fiddle Base Sewing Machine