I was very excited when I found this ladies 1930s jump-hour Cyma. I've seen a few ladies covered deco jump-hour pieces but none with a design like this with the sub seconds dial. The seller claims it's a new old stock (NOS), never used and you can even see some sort of tag in one of the pictures.
However, and this is the big however, the movement is completely blank. It's not signed Cyma, doesn't have a 'swiss made' or the number of jewels on it. And all other Cyma's of the period I've seen are signed and have different kinds of hallmarks. The seller claims not all manufacturers signed their movements at the time and that to his knowledge the movement isn't from another manufacturer. Any opinions? And if it's not Cyma, what could this blank movement be? And does this mean I should be weary about the dial being original as well? Below are some pictures of the watch:
And here's a Cyma caliber 354, which was used on some ladies models from the 30s, for comparison.
Thanks in advance for any insights!