Thoughts appreciated

[Bazooka Joe]

I am new hear so thought i would say hello.
I have my fathers old Rolex watch for 20 years now. I replaced the strap some years ago as it didn't have one with a new one sourced through my local Rolex dealer.
I think it was purchased in Singapore at the same time that my dad bought my mother a Rolex Tudor when we were stationed there. He was a Wing Commander in the RAF. This was way back in 1965 but I need to take the strap off to find the serial and model numbers so that i can date it so i will visit my local Rolex Dealer and ask them to remove the strap so i can check the number.
I think its a 5513. It has never been serviced by Rolex so i am sure that the face and hands are original and the watch has never been polished.
I have attached photos. Is this dial what you guys call a GILT?
I never wear it but need to make sure that it is as original as i hope it is.