In a large lot of watch crowns I found this large IWC signed crown.
All I can Find about IWC Crowns is that they were signed with the Fish and later on with "Probus Scafussia" but nothing about IWC signed Crowns.
Is there anyone who can point me in the right direction?
The crown measures:
6,85 mm diameter
3.5 mm thick
0,9 mm tap size
2.5-2.6 watch tube size

 

I've never seen on like that... must be really old?

 

I believe so but I have absolutely no idea