Bezel Insert for 1665 Great White Mark 3 Dial?

[BDHD]

Hello guys!

This is officially my first post on Rolex Forums

I was wondering if you could help me spot if this insert is from a total different time period than the watch, or if it seems to correspond.

My concern is that the top of the inner triangle inside the 4 in 40 is "too flat". Is this normal? The fonts do not seem thin enough to be a service dial, but they also do not seem fat enough for me to be 100% sure the bezel is from the same era as the rest of the watch.

Rolex Sea-Dweller
Ref. 1665
Dial: Great White "Mark 3"
Picture: See attachment

Please let me know if this thread was posted in the wrong section or if I broke any of the forum rules. Any feedback is appreciated.

Thanks,
Leo