Well I have not heard of an 89 that has had a problem and if there is an 89 owner with a broken one I want to buy it, the nicest thing on the 89 is the dial. Now I have 2 gen IWC, a gen Rolex 1680 and a gen omega, oh and I nearly for got my zenith, and they don't get a look in these days!
Gentlemen and ladies ( if we have any) good watch smiths in the EU are hard to find that will work on reps,
We have seen time and time again people who take on too much work and their quality suffers, if Jesus is good ( and I have no reason to doupt with a name like that, then don't mob him)
If you have positive experiences then share them, if you have cause for concern then share them,
To the OP, please warn Jesus off that by you advertising his services here his work load can increase very quickly, ask him to maintain quality and communication rather than quantity.
My vote goes to the 89, worn it almost every day since I got it last year, and has been to kasachstan, Sweden, UK, Spain, Zambia, Zimbabwe and now India ( pain with the half hour time zone though) I love the 7750 gmt, if I see on of these for sale new or nearly new in the EU I may just buy it for a spare!
I would assume that with a broken stem it would it would not wind at all but if he had to glue a new one in then maybe it was stripped threads in the crown and that was why it was slipping, at least it is working now
If this is a 2836 then ensure you only depress the crown removal pin with a 1.2mm screw driver ( there is a 1.2mm slot for a reason) and only do that and remove the stem in the hand set position