AU338MAG,
I inferred you bought it new in ‘97. My mistake. If it was used the seller could be correct. Best I have been able to tell, the transition from Brown to McMillan took place right around the time of the introduction of the stainless KS (first cataloged ‘92).
By ‘93 the transition was definitely complete as they had introduced the safari ks which was a McMillan only product. I’ve got a ss ks which dates to late ‘92 and is in a McMillan. I’ve not seen a ss ks in person in anything other than a McMillan, but I’ve seen add copy from the introduction of the stainless ks which appears to show them in a Brown. Knowing Remington, it’s likely there are a few out there in Browns as the transition to the McMillan seems to have occurred over quite some time - likely as they used up inventory. I’m not sure how many ks left the custom shop in 1992, but it likely wasn’t a huge number. I’d love to know just for S&G.

If you care to post or pm a pic, I can likely tell you which it is.