All vintage Singers take a tad shorter needle then Schmetz. I quit using Schmetz needles. It seems I always have stitching problems with them that stops when I change to an Organ or Singer needle. I really like the titanium coated ones. Superior sells Organ needles and there are many online places to buy in bulk. FYI: Singer makes two different quality of needles. The ones you find in most discount stores are the low quality. The higher quality Singer needles are usually sold at dealers. Know the difference if you are buying Singer needles to be sure you get what you pay for.