I have just realised the Swap Zone is the proper place for this request -
I know I am not the first with this problem but but my Ikonta 521 is missing the shutter actuating link which is fitted to the door and goes from under the back of the bellows to under the lens where it triggers the shutter.Why it is missing is a mystery.
You can see (bottom left just under the lens) where the link is missing.
Good luck Samuel, it took me a couple of months posting on four different forums before I was able to get one. It came with a stripped out Nettal body.