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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.
  • A Card Table for the 400 Series

ISMACS is an organization totally independent of all sewing-machine manufacturers, past or present and is not affiliated with any of the companies mentioned in these pages.  Please Note: Do not contact any ISMACS official in an attempt to solicit a valuation - it is not possible other than by hands-on assessment and your request will be ignored.

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