The watch looks original and in nice condition, however I believe the asking price is very high.
Attached is a 10 karat gold filled time-only automatic Wittnauer from the same period as the watch in question. I recently acquired the watch as part of sixteen watch online auction lot which included several other collectible vintage watches in good condition including a Universal Geneve Polerouter. My winning bid was approximately $400.
If you shop around on line (e.g., eBay, Etsy, etc.) and are patient I believe you could find the same or similar watch as the one you are considering for around $100-150.
Happy hunting! Cheers!