Help Identifying Vintage Longines - Art Deco Lugs

Hello, I am new to this forum. I have a vintage Longines and hope someone can tell me its model/series, year made, and dollar value. I've looked all over the internet, which brought me to this forum.

This watch has a manual wind. It keeps accurate time but needs winding each day. Black dial set in 10k-filled case. Case size is 34mm without crown. Sunken sub-second dial. The unique turned lugs measure 17mm wide.

The caseback has 12 sides. I don't know if a friction ball will open it, or if I need a special tool. Hence, I left the caseback alone. The only marking reads, "10K GOLD FILLED L&K."

Google tells me:

• In the mid-20th century, Longines shipped only the inner workings (movements, dials, and hands) to their plant in New York to avoid heavy US import taxes on imported metals (gold).
• Longines contracted US-based case companies, like Lutringer & Kammerer (L&K), to manufacture the solid gold or gold-filled cases domestically. These L&K stamped cases are entirely authentic and historically significant. Once the cases were made in the US, the Swiss movements were installed inside them at the Longines factory.

That's all I know. If anyone can please tell me the model/series, approximate year made (I'm guessing around 1950), and approximate dollar value, I would be very grateful!
Thanks!

welcome, but.... black dials are dangerous (redial possible). A (small) nice watch-model anyway.
With this blurry picture it s hard to tell....

I also think it is likely a re-dial, though the photos make it a bit hard to tell.

The minute markers between 10 and 20 (esp. 11 and 16) look off; and the snailing on the sub-second dial looks like it might have been painted over

Thanks for the feedback thus far. I don't know anything about Longines.

The watch belonged to my grandfather. It was in a box for 50 years in my parents' home after my grandfather died in the 1970s. I found it while clearing out my parents' things. The leather strap was decayed so little bits of leather clung to the lugs and case. I wiped the case with a polishing cloth and added a new leather band. I haven't done anything else to it.

I had to google what it means to redial a watch. The dial has a small grid pattern that is difficult to see in normal light. Is that helpful? Here are some new photos; the first one shows the grid. I'm happy to take more photos if there are characteristics that help identify the model and age. Thanks!

handheld photos

Thank you! I'll find a professional who can open the watch. I was thinking it is a screwback due to the 12 edges, but now I wonder if it snaps on.

Thanks Jim, you are the best!

Want 😁

based on the style alone, it is a late 1940s or early 1950s watch. (Ie not art deco which was prevalent in the 1930s and early 40s).

There is probably no model name that can be identified because those are US market watches sold by Wittnauer which was the US distributor- and they marketed independently from Longines.

What you can probably find out if and when the case gets opened is the serial number of the movement, which can indicate the date Longines sold the innards to the US distributor.

The monetary value is relatively low in terms of what collectors value, because the watch is not very large and the case is gold filled.

Proper photos must be in focus - to see if the plating is worn and if the dial has been refinished.

That type of watch usually carries more sentimental value than monetary value.

Sometimes even a collector can appreciate a watch for sentimental value. I myself am actually wearing a gold filled Longines for which I wouldn’t spend, but a brother of mine probably got fleeced buying it for me. The case back is badly damaged and I don’t even want to imagine how much he must have paid to get it serviced. However I love him—he was spot on with regards to the style I like, the watch is keeping good time, and he got a great strap for it.