Irwin-pedersen

[USGI]

I've been comparing the picture of the IP receiver posted by Mikey51 with my S'G' receiver S/N 1829338. The barrel date on my S'G' is 8-43. Below is a crude composite picture of the IP vs the S'G'. I don't know if this is significant, but to me there are obvious differences in the two - mainly the machining marks look different on the S'G'. For some reason the shape at the rear of the bolt opening appears different too, but maybe it's because the angles of the pictures are not the same. Were these receivers supposed to be made on the same machinery, or did SG bring in new machines when they took over? - Bob