Hi Thursdayschild,
This is a fantastic thread and one of those feel-good stories to read that seems to have gotten better and better with every post!
One thing Mark said that I read twice was "2. The pain of the repair/restoration today will be forgotten by this time next year.", really is true, especially when you receive the watch and spend minutes looking at the watch spending a lot of effort ACTIVELY looking for scuff marks, chips, or any signs that is is the same watch as the last time you saw it before sending it in. I recently sent my watch in (luckily still under warranty) and when I got it back I was shocked at the quality of work put in, especially since I wasn't charged for it.
A couple years ago I also restored an old Omega Seamaster my grandpa gave me (luckily still alive :)) from the late 80's (generation before the James Bond Seamaster) - Omega also did a great job, but one thing I realized and learned from that and regret doing, maybe something you will consider or not is:
-how much of the original watch you want to keep (if given the option on the work order)
keep original dial/replace dial
keep original hands (even if the glow-in-the-dark material doesn't glow anymore)/replace hands
*keep the original crystal (the glass that prevents you from touching the dial)/replace crystal
These are the physical parts of the watch which you will see everyday and could potentially hold sentimental value for you as well, by that I mean:
- if you replace all those, the watch will look absolutely brand new, it won't look old or vintage anymore, and for a timepiece passed down, having some signs of age can be very nice, but a personal preference
-I know for you it is a timepiece that you will not sell, but collectors of vintage watches (not me), go for the original parts and the vintage look
-most importantly, for us sentimental types, is rather a combination of the above points but additionally if you keep the original parts to be used in the watch, it is truly (on the face of it, pun intended) the original watch from whomever passed down the watch (maybe some parts, like internal gears might have needed to be replaced).
Also the parts that you decide not to replace with new ones will be the same hands your father used to tell time on the same dial looking through the same crystal. Despite the watch being fully restored and looking all shiny brand new, there will be remnants of it's history and ownership that absolutely will be erased if those parts I mentioned are replaced. My grandpa never sent the watch in for servicing and it was a watch that he used for cooking, farming, evening walks, etc, and the scuff marks and dings were records of that usage. Of course any fine watch company will do a great job buffing and polishing (where needed) the case and bracelet of a watch so those signs of wear will be erased, but the parts you can keep original (if you choose so) will still show that history.
Please do keep us posted on the development of your father's watch's restoration and once again this is an fantastic thread!. (in no way am I trying to steal your thunder), but I'm glad this post is my 50th post on this forum!