Yes, they did start a second batch of serial numbers and there was an information circular sent to Quartermasters to this effect in order that there should be no confusion relating to apparent duplicated numbers.. It was because after 99C9999, the numbers re-started at 0C00001. But the numbers only went to somewhere near the 0C38500 or thereabouts region.

I have a feeling in my bones that ALL Savage series production was marked US PROPERTY