Heh. Just ran across 547604, also an EG in 300 Savage. Much more worn than this one, but it’s both stamped to the side and d&t.
They often come in batches.
Joe Boren's xls also has notes indicating factory D&T on:
99EG 250-3000 535735
99EG 300 Sav 548552
99EG 250-3000 698393
