No info on the Rem-UMC, other than it is post 1912.

The WRACo 30 Army headstamp was used 1911-1967.  The WRACo book says that 150 grain soft points were loaded about 1927, but if they were Winchester factory loads, you might see a small "w" stamped in the side of the bullet.  With the pattern stamped into the cartridge heads, the 2 shorter cases are probably reloads.  In any case, they are simply curios.  You might get one load out of them, but it is not worth the risk to either you or your Krag.