I think this discussion is rediculous. Omega once after the horror Omegamania auction admitted that until then their confirmations about watches were often based on informations they got from their customers. If somebody wrote them that there is this and that 321 cal. with a 15.xxx.xxx serial in his 2915 they wrote this in the extract. The truth however was, that for some of the early chronographs as the 2915's and the early 2998's they had nothing but records saying that this and that movmement number was delievered on this or that day to the retailer in this or that country.
The reason is, that those watches were not produced in Bienne at Omega but in Orient at Lemania and redords from there got lost over the decades. I had a communication with Omega a couple of years ago confirming me this fact. What they said also is, that for very few 2915's of this period they do indeed have more than this record information so maybe we talk about one of this rare and lucky examples here.
For the buyers of this watch here it is easy to find out. He can simply go to the web page of Omega and order another extract for the movement number saying it is sitting in a 2915 case. If they have in the papers that it was build in a 2915 this will be written in their extract (but always without -1 -2 -3) if not, there will be written "not applicable".
Concering the BASE 1000 bezel of this 2915-3 I do not agree with the theory, that there was a model solely for the 2915-3. To my researches there were two slightly different designs for this bezel probably due to different manufacturers in the Biel area as we see this with dials, hands, cases, and they were fitted to late 2915-3, 2998-1 and 2998-3.
Finally I want to repeat that not only the small leave hands are genuin for a 2915 but that this kind big hour hand we find here, is definitly belonging to a 2915-3 or a very early 2998-1 as this triangle lumnious hour hands got significantly shorter later on.
