There's n inspection stamp inside of the magazine cut off cut out in the stock. I can't see anything else very clearly at all. Anyway, it's a neat stock, even if it does have two stock bolts.
http://www.ebay.com/itm/U-S-MODEL-19...item25831d3347
http://www.ebay.com/itm/U-S-MODEL-19...item25831d3347
