FWIW in the middle '60s one of my Trinidad classmates had been entrusted to restock an early G&H 1903 sporter having an integral rib (HAH, grin). The barrel was a Poldi AntiCorro half-octagon with full-length integral rib, and the original stock had a bag grip and schnabel forend tip with the usual Lyman 48 receiver sight cut. The rig appeared to be an early one.
I used the discarded original G&H stock on one of my own rifles and unfortunately immediately traded it off. Young and dumb.
No I don't remember the barrel number or other specific marking, sorry. It was a 30-06 with caterpillar front bead in the integral front ramp. After all, it was only one rifle and it was also 45 years ago so....
Also FWIW most of the soldered ribs I've seen have been used on converted military barrels with their steps turned smooth, or on other round-barrel applications. Full-length soldered ribs on the military barrels and quarter-rib soldered on the commercial round ones, integral on the 1/2 octagon ones. Just one man's experience though.
Regards, Joe