Originally Posted by
manicmike
Pretty sure it's not that: I have a lot of these Singer bayonet bulb machines and any brand of bulb will fit. My local parts supplier only sells two brands. The more expensive is made in Germany, the cheap one is from China. Sounds like she may have found something even cheaper (quality-wise).
I got them from Sew-Classic. The first one I put in was burned out an hour after I put it in the machine! The second one has held up so far.