Alex Bigatti shows us this wonderful old Ulysse Nardin and wrote us:
"This Ulysse Nardin was purchased by my grandfather 1n 1938 in Buenos Aires, Argentina. Case is 18K gold. Originally the face was black (I still have it), and he changed it for a white one at one point. He also changed the leather band for a 18K bracelet.
Besides the pictures of the watch, I've enclosed pictures of the Certificat d'origine, the series number: 392356, and even the purchase receipt. I'll appreciate if anybody could let me know name or model.
Note the unusual numbers displayed on the face."