Dating wertheim treadle sewing machine
It had a larger bed size at 14-1/2" The Singer 128K was manufactured around the same time as the 127K - 1912.The difference was the 128K was smaller at only 12-1/2" bed size.However hopefully this page will help identify your sewing machine model number in conjunction with the other details we have available relating to sewing machine serial numbers..!How to Identify an old machine without a serial number..?Here the image shows a lovely 66K about 1920, originally may have been hand, electric or treadle operated.
It had smoothness that other sewing machine manufacturers could only dream about. The Singer 201K was cast iron in Black with a round neck body, also made with an Aluminium body which had a square neck.
The Singer 221K was the same machine without the tubular bed, it also had the lift up fabric table like the 222K Both the 222K and 221K were tiny machines known as the original Singer Featherweight machines.
The light aluminium frame was only 9-3/4" wide, even with the fabric rest down it still was only 14-1/2"....!
The Singer 15K was manufactured over many years from 1910 - 1964, then reproduced again in 1982 called the Singer 15N.
The Singer 222K as shown has the sleeve arm or sometimes called tubular bed.