New to forum just picked up a vet bring back BSW DSM-34. serial 136xxx num matching except barrel band most parts are simpson marked s in triangle. With what looks like a very small SA property mark on bottom of grip, BSM in square on left of stock and 3 pyramids with S in middle on bottom of barrel close to rec. and SOLD Bd on stock disk. my question are those markings truely SA and what do the 3 pyramids with s stand for, BSM in square, and markings on stock disk. Do those markings detract from the value thanks for the help..