Authenticity check on this 18K - 7206

[Trimapa]

Hello to all on this forum , thank you to the administrators for allowing me to join and post .
I have inherited a Rolex Submariner 16618 in 2010 but only now I can afford to have it restored - serviced at Rolex in Madrid . I was told that if it is only the complete "standard" overhaul with polish it would cost me around 600 euro . I guess that is correct and I should have it returned to me in about 3 weeks . The main problem is that the original gold bracelet is missing from the watch . I have been to see a Rolex dealer and he said I'm looking at a small fortune to get the correct yellow gold original bracelet from Rolex . So I decided naively to check Ebay and several forums dedicated to Rolex . I stopped here as it looks user friendly and I found many instructive posts .
I have no papers relative to the watch but I was led to believe that the watch is from the 80's which seems plausible .
My question is : What model of bracelet would be correct one for this watch . I'm sure it should be of the oyster type 20mm between the lugs , but there seems to be sooooo many variations .
I have found a nice looking one ,18K model 7206 with "rivets " on Ebay . The seller has sent me several pictures , but before taking the plunge for 5000 euro I'd rather have it checked out . Maybe start here ?