SMT Jig-Saw Puzzle

Probably made by a very small Scottish wooden jigsaw maker, but supplied in an excellent bookshelf type box.
The cutting was probably done with too loose a blade, as the cut edges of the pieces are not straight, making reassembly very tricky. Nonetheless, a very uncommon and fascinating promotional puzzle. Hard to date, as SMT were founded in 1905 and retained the name until the early 1960's

Artist: Unsigned
Brand: SMT
Material: Plywood
Nationality: British-Scotland
Pieces: 100
Size: 10 1/2" x 7 1/2"
Theme: Motoring,
Title: SMT