Help identifying vintage Omega Seamaster

Help identifying vintage Omega Seamaster - Unusual uniform hour markers (no double baton at 12)

Hello everyone,

I recently acquired this vintage Omega Seamaster, I know it’s old, it was my grandfather's, and I would love to get the community's expert opinion on it. I am trying to identify the exact reference and determine if this dial configuration is a known factory variation.

About the watch:

• The case back features the classic hippocampus logo.
• It has a champagne/creamy dial with natural patina.
• The date window is at the 3 o'clock position.
• The hands are dauphine style.
• The Omega logo is applied.

The puzzling detail:
The applied hour markers are baton style with a central dark groove/inlay. However, all the markers are uniform, including at the 12 o'clock position.

From my research, I know that common references from this era (like the 166.010 or 168.024) typically feature a double baton marker (the "II" style) at 12 o'clock, with single batons elsewhere. My watch has a single baton at 12, just like all the other hours.

My questions for the experts:

1. Is this uniform marker configuration a known, rare factory dial variation for this era?
2. Could this point to a specific reference that I haven't considered yet (perhaps a pre-DeVille or another Seamaster sub-line)?
3. Given the natural patina and the quality of the applied logo, it doesn't look like a cheap redial, but have any of you seen this specific dial before?

I haven't had the case back opened yet to check the reference and movement numbers, but I plan to do so soon.

I have attached photos of the dial and the case back. Any insights, references, or thoughts on originality would be greatly appreciated!

I'm from Brazil, please excuse me if my English isn't very good.

Thank you in advance for your time and expertise.