Rolex oyster royal "amazing dial" my first vintage Rolex "NEED INFO PLEASE"

[watch royal]

Hello,
I recently purchased my first truely vintage timepiece. It is a 1956 rolex oyster royal case number 6444. It has an amazing quarterd dial with a waffle pattern it looks like tiny ridges on the dial. The second hand has blued from age, the dial & watch in general looks so amazing in person vs my pictures. It has a rolex 1210 17j movement. I have some questions for you guys, any help would be greatly appreciated.

1: I was told the watch is 100% original & un touched, was told the dial & hands were not refinished & that the watch was not ever polished & the crown is original to the watch, Do you guys agree?

2: I tested the watch & it has a 48 hour power reserve & is around 18 seconds fast a day tested over 10 days, is that acceptable for a 60 year old watch or do you guys think I should have it serviced or just regulated? Or dont fix it if its not broke?

3: are parts plentiful for the cal 1210 movement, also since its a manual wind will the crown & tube wear quick, ive only had a 5513 sub & that is an auto. What would be a fair price to service this manual wind?

4: what do you guys think the value is for this watch for insurance purposes & I want to know if I got a good deal on it?

5: I would like a oyster bracelet for it, if anyone has one, I think its 18mm