Tudor Sub / 94110 / 1980 / Blue

[Atari15]

Trying to work a deal on a Tudor Sub that I found at a local reputable Watch & Clock shop near my parents home.

Just wanted to see if any of you see anything odd about this piece.

Here's what I know

Ref: 94110

Serial : 93X,XXX (which should place it in 1980)

Bezel insert has been replaced.

I can't find any exact matches from the Movement photos, as the Tudor stamping on the rotor seems different even on other Sub models from the same year with the same Ref.

Any help would be much appreciated.

If anyone would love throw out a ball park price for what they think the max I should pay for it, I'd love to hear it.

Photos attached (they're not the best as I had to have the watch maker send me some to go over details).

Thanks in advance!