To me, looking beyond the work, there is something odd about both. Are those original Winchester actions? Or are they some later near-copies? The lower tangs do not look quite right. If you were simply doing the paperwork, maker & SN?
I think there has been extensive work done to the tangs by shortening and welding holes up. With no evidence of a bolt through the top tang, I'm almost sure that they have through the stock bolt modifications to improve accuracy. The cartridge is probably the Aussie .222 rimmed that was popular in single shots back in the 60's.
