This unique stock is inlet for a .375 H&H magnum rifle with the second recoil lug in the barrel channel. It is cross-bolted, but in the post-64 style. Additionally, it appears to never have been installed on a rifle. Possibly this was produced as a replacement part in the post-64 era for the pre-64 rifle.
The wood on this stock is in excellent condition with an original finish. There are no cracks, splits, gouges, or other significant issues; there are a couple of very small marks from handling or storage. The checkering is original and also in excellent condition. The recoil pad is original, with a few smudges.