16700 GMT Master Coke - Worried about authenticity - Please help!

[VacherObsessive]

Good afternoon

I recently put down a hefty deposit on a GMT Master 1 16700 Coke for my wife for our/her 5th anniversary (her choice), original snap from my phone is below. we went into the store in Bond Street (London) and tried on a number of pieces that my wife had in mind and she went for this. can't take any more pics than the attachment below at present as the watch is still in the store as I got the balance on finance so that has to clear. we got it at a fair price which I thought was good after checking all over Chrono and elsewhere for comparison, condition was beautiful as well with 1 or 2 minor dings but I don't mind as I'm sure she'll make some of her own, so she can wear it without worrying. it was the best priced one in Europe from a bricks and mortar dealer, and a dealer that we know and is not far from our house.

I was watching some vids today to get up to speed on the Coke, and I noticed some things which did confuse me as the ones posted were slightly different looking, especially the number 22. I then realised that the slightly fatter numbers were ok for this reference as it was a difference between GMT 1 and 2. I'm still not 100% though

secondly, I then noticed on a forum blog post here that the GMT Master 1 ref 16700 was only produced from 1988 to 1999. Whereas the listing for this was a 1987 model

So I'm now panicking that is this actually a different model (maybe a black GMT 1 with the bezel replaced?) or they got the ref wrong? I asked specifically in the store on all the models that my wife was trying out: "was anything replaced at all, any service change on the dial or hands etc?" as effectively this is an investment piece, being a Coke and paying a lot of money, more than a new GMT ceramic from the Rolex boutique. he explicitly said no, this and all the other pieces are 100% original. it has box but no papers, so I am taking the stores word on it, as they are meant to be a reputable dealer

please can you comment on your thoughts? I do not want to be in any doubt. if I've bought wrong and you guys think there is anything fishy I will cancel the whole thing.

many thanks