Opinions on this 1024

[BA1980]

First of all let me say hi to everyone, I am in the market for a Rolex and quite interested in the 1024's. I have seen one that I am on the border of buying and would like some opinions if possible.

I have a little bit of knowledge on some Rolex's watches but I believe this is from the 50's so my knowledge is limited to say the least.

I am hoping by adding these pictures someone could help. I believe the band has been changed and is now the 18k example shown. It comes with the paperwork and original box. Just curious to see if these are commonly 18k or 14k? Also I can see the back is silver, any idea as to why this could be.

Looking forward to the responses and getting involved in the community.