I was under the impression that the "92" in the BR03-92 means that it uses an ETA-2892. I came across one for sale on ebay, and the seller says the following:
Is this accurate? The BR03-92 that I have coming in the mail also has a 2xxxx serial numbers. I was hoping that I would have a watch with a 2892 in it.
Since this BR is equipped by ETA 2824 (or SW-200) which has been used in newer series (you can tell from the the serial which is 2xxxx),
the screw on the case back will not be exactly the same position as older series which were equipped by ETA 2892. BR 03-92 which serial start with 2xxxx have this same screw's position.