Help identifying this IWC?

I ran across this IWC recently in NYC. It is a cal 83. I did an archive search for cal 83 and could not find information on this one...at least with this dial. Any one have some idea about this model, its age, its history, etc. Just curious,

Bill

It would be a Ref 410.

Ref 410 YG cal. 83 12 lig, 17mm strap, from 1944