Identification of a vintage steel hand-wound IWC

Dear Members of the Forum

I recently inherited an old vintage steel hand-woundIWC-Watch and I wasn't able to identify it yet. I believe it's something similar to a calibre 401. Could you please tell me what model it is and for what price it could possibly be sold?

best regards

M. Zbinden

imgur.com/a/duGLm

It looks very nice and in good condition but without the movement number and reference from inside the back of the case we cannot help. Get a good watchmaker to open it for you and get those numbers.