Neat gun.
My guess is the Factory cut the original barrel in 56 and reblued it.
So, it comes in about as cool as a King modified gun to me. They are no longer original, but we Oooohhhh and Aaahhhh about them all the time. A $500 M&P with a King rib and cockeyed hammer jumps up to $1500. Why is this one so different?
Also, I mean, like really, uhhh, you know...... a gun wearing Roper grips is MISSING the original grips?
The buyer may have know full well what he was getting, and simply thought it was worth it as a rather unique Factory customized job. People buying $1000 guns with odd barrel lengths and Factory rework marks SHOULD know what they are bidding on.
Eye of the beholder.......