diane keaton keanu reeves still dating - Dating wertheim treadle sewing machine
The tension unit was directly in front on the needle which in turn threaded from right to left.The slide plate (to access the bobbin) had a small oblong hole which aided whilst sliding the slide plate to the left to view the bobbin.Here the image shows a lovely 66K about 1920, originally may have been hand, electric or treadle operated.
If your sewing machine does not have a model number, but has a serial number similar in location to the image above, use the images below to help identify the sewing machine model number.
The Singer 99k sewing machine is small in size measuring only 12-1/2" wide, this image shows an early version the 99K (99K21 - 26) made between 1924 to 1954. The stitch length was adjusted via a screw and the machine did not stitch backwards.
It always look a neater machine because of its compact size.
The Singer model 128K also had the vibrating type shuttle.
The 66K has a bed size of 14-1/2" so is much wider than the 99K The Singer 28K had what was called a vibrating shuttle or boat shuttle or bullet shuttle...