Junghans may be an alternative to check up on Ranfft. I measure the dimensions to 26,5 x 20 mm. I haven’t seen any identifying symbols or numbers so far. If anything shows up during disassembly, I will report back. The brand name on the dial states ”Nidor” but that’s one of those old names, I see from time to time and it doesn’t say much about the movement inside, or what do you think? Sent from my iPad using Tapatalk
Hello rrandell and welcome to the forum. Would you mind doing two things?
Please go to the lounge area and write a short introduction to yourself and your interest in clocks and watches.
Then post a picture of the catch you mentioned, to show why it isn't "catching". It is called a click, by the way, and by the sound of it, the click spring has broken. It should be no problem to replace, but a photo will help us a lot.
Also, you have come to the right place for advice on Timex. Jersey Mo for example is an authority.