Inherited Omega Seamaster

Hello, all, first time poster here. I’ve been following this site for a bit seeking information on my inherited Omega Seamaster, but figured the quickest way to answers is to share some pics with the smart folks that follow this forum. I love watches and have a small collection, but this is my most treasured (valuable or not) as it was originally my paternal grandfathers’.

Here’s what I’d like to know:
1. Approximate age / year made.
I have no idea when my grandfather bought/received this watch. I assume sometime between the 60s and 80s and also assume he bought it new.
2. Model number.
I know i can find this on the inside of the watch, and intend to take it to a shop to do so, but any help prior to that visit is appreciated.
3. Band replacement
I’m guessing this isn’t the original band, and would like to upgrade it. I’m open to suggestions, but was looking at gold Omega bands first, but don’t know the right style or size. I’m willing to make an investment in this watch as it will be an heirloom to hand down to my son.
4. Damage and repair
Watch works great, but there is a small dent in the bezel. Is this a big concern or a minor fix. Recommendations for a Kansas City watch shop?
5. Ballpark Valuation
I don’t have a clue. Not a huge deal to me as I’ll cherish regardless, but it would be good to know.

Let me know if you need more pics or info, and thanks for your help.

Nice watch!

It looks like a 166.010 but I'm not an expert. It has onyx markers but lumed hands, which can be easily fixed. I would date this one from the 1960's.

If that's what I think it is, an Omega 3010/511 would be the right bracelet.

Thats a pretty seamaster , as said above the information you need is on the caseback and caliber of the watch but you will most likely need a trip to a watchmaker for a service so you keep that watch in a good shape , I wouldnt care about the mark on the bezel but maybe down the road you can find a new one to replace it personally I wouldnt . Change the strap and wear it on a nice leather one cheers!