term for an original last from which other lasts are copied or graded
Models are often reinforced in ways that working lasts aren’t, such as by rows of nails or metal bands along the featherline.
Some model lasts have had hinges or detachable blocks to allow adjustment of key measures like toe spring or heel pitch.
Model lasts may also have have dome-head nails or other additions to create measuring marks on copies.
On other hand, models may also lack features of working lasts, such as thimbles, working mechanisms, and plates.
Sources
- Crockett & Jones blog post about a visit to Spring Line, with photos of models