Originally Posted by
Mickey2
There is a develompent in the Singer round bobbin models from model 15, 9W7 to 115 and 101 and 201. There's model 66 in 1900 and I have always though of 101 and 201 as a development from the drop in bobbin machine.
Some early German models are rotary, with similar bobbin case as model 15, but not identical setup. I don't know if it's possible to sort out the lines of development, dating and origins at this point, a 100 years down the road.
Likely impossible...
The Featherweight has combos of other older machines, too. I wonder how much industrial machines influenced....?
Not much effective innovation ever since is there? And even then what there was wasn't necessarily an improvement just cost control.
Then there is the ZZ ability + fancy stitches and how that has evolved from one machine to another.