Archer
··Omega Qualified WatchmakerThe original damaged dial you sent to Omega appears to be a "re-dial." It's probable that at some point your Dad was "upsold" on a redial service by his local watchmaker. On the original damaged dial, note how close the Omega name is to the applied logo, and note how the "3" does not align with the 15 minute / second rail marker.
My grandfather also had a 50s Seamaster and it ended up with a dodgy re-dial. My theory is a lot of local independent watchmakers in the 1960s -1980s "upsold" their clients on a re-dial when they brought their watch in for a mechanical service. These re-dials were clearly not Omega authorized as they usually look pretty sloppy.
Anyway, the Omega service came out great. Enjoy your dad's restored watch in good heath!
Not really an "upsell" but doing a redial during a regular service was a common practice back then. It was an expected part of a service if the dial was in any way damaged by water or other types of deterioration. If it wasn't done the customer would likely complain that the service wasn't done properly.
Just like polishing the case was considered part of the service, something now that I rarely do. Now the customer must ask for it.
People were not as concerned with keeping watches as original as possible - that is a VERY recent collector thing...and in the past people wanted the watch to look like it just came from the factory - that was the industry standard practice.