Help to identify a black & gold tachymeter vintage Chronograph

Vitezi

According to Mikrolisk, Ravis was a wordmark of Fabrique de Montres Imowa SA / Benno Dreyfuss of Zurich, Switzerland; registered on 23.6.1939. Imowa had a few other brands back in the day, my favorite of which was the (Dr.) "Drewatch."

Based on the few fuzzy photos above, all you can do is check the dial to look for flaking paint (make sure the text and printed scales are present and that the numbers line up with the seconds marks) and check the back for the gold hallmarks. The poinçons de maître can be looked up here: https://www.vintagewatchstraps.com/swisspdm.php

Vitezi

According to Mikrolisk, Ravis was a wordmark of Fabrique de Montres Imowa SA / Benno Dreyfuss of Zurich, Switzerland; registered on 23.6.1939. Imowa had a few other brands back in the day, my favorite of which was the (Dr.) "Drewatch."

Based on the few fuzzy photos above, all you can do is check the dial to look for flaking paint (make sure the text and printed scales are present and that the numbers line up with the seconds marks) and check the back for the gold hallmarks. The poinçons de maître can be looked up here: https://www.vintagewatchstraps.com/swisspdm.php

Larry S

Buy the watch because it’s a good looking piece and you like it and are willing to spend to service. Asking price = gold value IMO. Don’t buy if you seek an investment.

Vitezi

Other chronographs marketed by Imowa seem to use Landeron movements, but it's anybody's guess until you get a peek inside.

The late-30s/early-40s were arguably the golden age of chronographs, so anything from that period is collectible. If you're going to wear it, don't forget it will likely need a movement service that will be more expensive than a simple three-hand watch.

Your watch case appears to have hallmarks in the blurry caseback picture above. Most watch case manufacturers stamped those hallmarks on the inside, but your example the marks are on the outside. Hallmarks stamped on the outside are often a sign of a fake (gold) case, so you need to do your homework. Read the links I provided to you above. Verify the hallmarks match the stamped case. Use the hallmarks to identify the case maker. Look for other examples of that casemaker's work to see if they were stamped on the outside too. Make sure it is a solid gold case and not a gold-plated case so that you don't overpay for a solid gold case if, in fact, it is not. 😀