I bought a 1942 Singer 66-16 yesterday (thanks Joe for helping me identify her!) and I'm in love. The cabinet is lovely! The only drawback was finding the box of attachments were all high shank and this machine needs low shank. But at least I have a low shank all-purpose and a zipper foot that will fit her!
I'll sell my 15-91 centennial to make room for her. Hate to say goodbye to her though, she's been so good to me!