Singer 27 Tiffany Decal, 1907 vintage. Treadle cabinet came with a 1915 machine.
I'm using this attachement set. It is older than the machine, but I don't have any that are the vintage of the puzzle box sets (they are older). The copy shows a box for a Model 15, I've got one for the 27 so it's a bit different. The numbers on the parts are the same (1-19). This is a reprint of a manual dated 1906
This is the picture in the manual dated 1907 - with a back clamp set (for the Lotus) that is very similar.
