hey history friends, does anyone know how to date vintage sewing machine parts? ive got a set of greist attachments which are as far as I know pre-1950s but other than that I don't know where to turn
seen from Germany

seen from Poland
seen from France
seen from United States
seen from United States

seen from Ukraine
seen from Saudi Arabia
seen from United States
seen from United Kingdom
seen from Canada
seen from Greece
seen from United Kingdom
seen from Armenia
seen from Yemen

seen from United States

seen from Poland
seen from Malaysia
seen from Spain

seen from United Kingdom

seen from United States
hey history friends, does anyone know how to date vintage sewing machine parts? ive got a set of greist attachments which are as far as I know pre-1950s but other than that I don't know where to turn