Many folks covet the Singer 15-91 for its gear drive that presumably makes the machine capable of sewing heavier materials. No belt to slip or need adjusting. It has the revered 15 Class oscillating hook that has been a standard for almost a hundred years and is still manufactured today. I have owned several 15-91s and agree that they are one of the best made 15 Class machines.
However, there is a Singer that followed the 15-91 that is every bit as strong and reliable. It uses the same motor, same gear drive, same drive train, and same 15 Class sewing system but sports more modern styling and paint, the 15-125.
But, for some reason, while many want a 15-91, few wish to own a 15-125! Why would anyone want a 15-91 when they could have a 15-125? Perhaps I am partial because a 15-125 was the first machine I bought when I embarked on my vintage sewing machine collecting spree - not my first machine, that was a Singer 301 but a 15-125 was the first one I bought purely as a collectible.
The one pictured here is my second, one I picked up at a local auction where, again, I was the only bidder. This is another machine that has sat idle for years because it was buried under other, newer acquisitions. I uncovered it a week ago and I decided to oil it up and check it out. Usually, I sew only one project on a machine before I become bored and swap it out for another machine but I have sewed 4 projects on this one and have no intention of replacing it anytime soon.