I bought the Underwood for 600. Its non import and nicer finnish than the Inland. Serial number is 6112464. Its a rebuild for Korea. Barrel marked SA 10 51. Late replacement barrel I take it. Stock is a low wood marked HI in the sling well and AAT wich I take it is rebuild mark. Rear sight is marked H in a shield and adjustable. Barrel band is SI. Front sight is marked N. Trigger guard is stamped and welded with flip safety and M marked mag reliease. Has a round bolt. Nice looking almost mint with pretty wood. I'll shoot this one since its a mixer. I'll take them apart and look at the innards. I got my book today US M1icon Carbines Wartime Production so I have some reading material. I'll post pictures of my carbines tom. I'm going to buy a cam and upload some.
Michael