Hello. A nice person from here messaged me on Reddit.

i've found in the past that you can stipulate to the service centre how you would like it serviced, divide the service into two parts,
it has a cosmetic one which concentrates on making the watch appear as close as possible to how it looked the day it left the factory,
and a mechanical part which deals with the operation of the watch, i'm in a similar position where i inherited several watches, and like you, want to preserve the look and evidence of all the wear left on it, but, also keep it running as efficiently as possible, a few times i've dealt with an Omega service centre here in the UK and they're very obliging and understanding, so from a watchmaker's point of view the two aspects of the service can be treated separately,

Start a dialogue with them, the Omega affiliated centres are a bit more expensive than independent watchmakers but do an impeccable job,
but still make it absolutely clear at risk of repeating yourself over and over again that the cosmetic / aesthetic part of the watch is to remain as it is unless doing so would interfere with it's operation, more of a problem with mechanical watches with old tritium lume cracking and falling through a date window, i wouldn't imagine a quartz one like your father's would suffer as much, but i'm no watchmaker.
I asked the one i used here if it would be possible to take a few photos during the service and they were almost delighted to be asked, said it was no problem
here's a link to the Omega website with three service centres in Atlanta,

https://www.omegawatches.com/en-gb/store/country/united-states/state/georgia/city/atlanta

good luck and let us all know how you get on

Dang good shape for 17yrs of daily wear. What wear is there is good and honest. I like it. 👍