My late friend and shooting partner, Tom Shacklett, was an avid small bore shooter and had a number of Remington 37's. His relationship with Harry dated back even further than mine, so he could well have barreled the rifle for Tom. I was tasked with liquidating Tom's collection after his untimely death in an auto accident, and I don't recall that rifle specifically, but I was never a Model 37 shooter, being an Anschutz fan,

Harry usually stamped "CP" for "Creighton proofed" on the barrels he fitted, at least for the center fire calibers. I don't know if he did the same for rimfires.