In use from 1879 up to 1963
Recorded serial numbers: 27,389,327
Recorded factories:
- Bonnières-sur-Seine (France)
- Bridgeport, Connecticut (USA)
- Campinas (Brazil)
- Elizabethport, New Jersey (USA)
- Karlsruhe (Germany)
- Kilbowie, Clydebank (Scotland, UK)
- Montreal (Canada)
- Monza (Italy)
- Podolsk (Russia)
- Querétaro (Mexico)
- St. John's Factory, Quebec (Canada)
- Taytay (Philippines)
- Utsunomiya (Japan)
- Wittenberge, Prussia (Germany)
Successor to the "New Family", was the "Improved Family", which was given the class 15 designation.
Originally patented by Singer engineer P. Diehl in 1878 (UK patent 2813, 13th July 1878), the 'Improved Family' was launched in 1879 as a treadle machine, lock stitch oscillating shuttle. It has the tension on the face plate.
By the 1890s the name 'Improved Family' had been dropped and replaced by "Class 15". In the same period, the had received a serious upgrade.
It had the most common domestic variant and also several industrial variants.
Documented Machines
(What does it mean?)Total n.: 657
Factories:
- Bonnières-sur-Seine (France)
- Bridgeport, Connecticut (USA)
- Campinas (Brazil)
- Elizabethport, New Jersey (USA)
- Karlsruhe (Germany)
- Kilbowie, Clydebank (Scotland, UK)
- Montreal (Canada)
- Monza (Italy)
- Podolsk (Russia)
- Querétaro (Mexico)
- St. John's Factory, Quebec (Canada)
- Taytay (Philippines)
- Utsunomiya (Japan)
- Wittenberge, Prussia (Germany)
Documented Decals:
- Early 20th Century Industrial
- Eye and Trapezoids
- Eye and Trefoils
- Filigree
- Floral (Fiddlebed)
- Floral Variant (Forget-me-not)
- Gold Wings
- Leaf Vines
- Owl
- Painted Daisies
- Painted Roses and Daisies (Flowers)
- Painted Roses and Daisies Variant (Potentilla / Apple Blossom)
- Pearled
- Pheasant
- RAF
- Red Eye
- Scrolls and Roses
- Scrolls and Roses (Fiddlebed)
- Sphinx (or Memphis)
- Sphinx Variant (Indian Star)
- Tiffany (or Gingerbread)
- Wild Rose
Documented years: 1875 - 1961

