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International Sewing Machine Collectors' Society

Fostering the collecting of, and research into, sewing machines.

Class 403

Singer Model 403 Slant Shank Sewing Machine

Singer Class 403 Sewing Machines feature a slant shank and rotary hook. They use Class 66 bobbins and 15x1 needles.

Singer 400 Series Model Descriptions
The Singer 400 series represents Singer's innovative mid-century design approach, featuring the revolutionary Slant-O-Matic needle system. This comprehensive guide details the specifications and unique features of models 401, 403, 404, 411, and 431, highlighting their mechanical differences and specialized capabilities.