Vintage Submariner help please

[davemcdus]

Hi All,
I'm new here, having read a lot of helpful posts over the last couple of weeks as a visitor. I'm in the process of trying to buy a model 5513 no date Submariner from the 70's -80's. Most of the watches I'm looking at are one eBay. There are several available, all from sellers with good ratings who have guaranteed a refund if Rolex here in NYC won't authenticate it, but I've noticed some small details and differences between the watches that I'm unsure about so I wanted to ask a neutral source.

Anyway, here's my list of questions for you experts out there. Your help would be very appreciated...

1. Do all Rolex Submariners have the Triplock markings (ie-crown with 3 dots below) on the crown? I have located one watch (ca. 1975) that seems right in every respect except that it does not have the 3 dots below the crown.

2. Is it considered acceptable ( in a collectable sense) for there to be cracking in the tritium of the hour markers, or discoloration(grey spots) or water spots on the dial? Most of the watches I've found have some level of this.

3. Do hands and hour markers patina at the same rate? Lots of these watches appear to have newer looking hands or newer looking hour markers. Can this happen naturally or does it mean hands have been replaced or dials have been refinished?

4. Lastly, has anyone ever dealt with Pacific Bay Watches in Newport Beach, or eBay seller firstjewelrysource (or Edmar Fine Jewelry) based in Scottsdale Arizona?

I have included pics below for reference-
Pic 1 - genuine crown?
Pic 2- scratching on hour markers
Pic 3- Different hands?
Pic 4- Grey marks on dial (at 8 o'clock and left of crown)

Thanks in advance for your help.
Sincerely,
Dave