Hi, I have been given this watch by my Father- so far I have not been able to find out the model or value (Insurance)
I believe its a Ingenieur SL (Jumbo) with an 18Kt surround but far from sure.
It has six recesses in the bezel
[](postimg.org/image/rfwk8pze5/)
[](postimg.org/image/6k02s143r/)
It does have a "bubble" glass calendar date and the strap is stainless steel.
Any help would greatly be received.
Thanks,
Poly