Vintage Gruen Veri-Thin Precision Watch

This wrist watch is from the 1920s. Dark brown leather strap. The watch is petite for men, but women can use it as well. There's a minor crack at the 12 mark (look closely at the photos). Also micro scratch at the center of the crystal, that you will need a magnifying glass to see. Can't see it with your bare eyes. Screengrab of a similar watch selling on eBay for $750. Key search words: antique watch, tank style, deco style.