Help on Omega Centenary 2500

Hello!

I friend if mine inherited recently an omega centenary and he reached out for an opinion. dial looks pretty good in my opinion,but i am not too familiar with solid gold omegas. I made some reasearch and found lots of nice pictures and examples but just thought i would reach out to this amazing community.

this are my thoughts so far:

-caseback and crown might be replacements
-lugs might not be as sharp( not used to looking for gold watches, shine makes it hard to tell)
- minutes hand seems just a little bit long, but seen this across other references

thanks!

Can you confirm, that there is a JUB after the caliber number under the balance?

Thank you @MSNWatch those were my thoughts too!

@watchyouwant yeah i could have him look for the JUB next to the caliber number