Help identifying vintage IWC watch

I found this watch among my late father's belongings. It may have been his father's. Not sure if this info is helpful, but my father and his parents escaped Germany in 1941. I did some preliminary research and was unable to find other IWC watches that look like this, so perhaps it is not authentic. I have not had the watch opened yet. Can you provide any insight? Please let me know if I can provide other information, and thanks in advance for your help.
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Hello Loxanna,
Welcome to the IWC Forum.
This is a nice and interesting time piece, with important family roots.
It will be difficult to authenticate your heirloom watch without opening it. This operation should be performed by a watchmaker. You should try to obtain both the movement and case serial numbers. With this information you can check the "Date your IWC" web tool (just do an internet search). The database should return probable manufacturing & first sale dates, together with a "Calibre" for its movement. Pictures of the movement would enable visual confirmation of its authenticity.
In the meantime, my hypothesis is that the watch looks authentic, but the dial may have been repainted at some stage. This is not uncommon, dials of this age can be subject to some degradation caused by humidity for instance. The hands, crown, and case appear to be genuine at first sight. Finally, the German market has always been important to IWC Schaffhausen (a manufacture in the German-speaking part of Switzerland), so this in a way (slightly) increases probability that the watch is not a fake.
Good luck with your quest. If you happen to obtain pictures from the movement and serial numbers, please do post them here and Forum members will be delighted to help you.
regards,
Zoltan

To add to Zoltan's excellent assessment, your watch is very likely a Cal 83, which was produced from 1930 to 1947. The dial does seem to have been repainted at some time.

Very much appreciate the information you provided. I brought the watch to IWC in NY and they sent it to their facility in Texas. I now have the case number (1019889) and the movement number (984549). The "date your IWC" database online states that it is Cal 83 movement from 1938; case was most probably produced resp. delivered around 1939. As per IWC, the watch has moisture inside and many other problems and needs a complete rebuild/overhaul. It would need to go to IWC Switzerland for a detailed assessment and estimate. The rough estimate is "at least $1,000" and 3-6 months of time. It is not known if the watch can be repaired. Our next step as a family will be to determine if we want to send the watch to Switzerland. Feel free to weigh in with any advice on next steps or other things we should be considering. Thanks again.

Should you opt for the SPA treatment - The Wizards of Schaffhausen will send your Watch back to you looking like New!

Given your family history - if I was in your shoes, I would do it,

I would send it to Switzerland. Then again, I am an IWC forum member.