good points above, and without actually looking carefully at the gun to compare the polishing marks, and detail of the entire gun, it could go either way, have seen many, many cylinders over the years from older guns that the cylinder alone was refinished, and if not done properly, could turn plum from the process...have seldom seen an "original" WW II Victory model, that the cylinder alone was 'plum',but one never knows as weapons need in a 'hurry' may have gone through the factory process too quickly, now days you tend to see the refinished cylinders or parts being of a darker, more black finish as the salts used today are such, more like black oxide, different formulations from the older 'nitre' blues...........
except for Ruger MOST all the other factories seldom shipped out guns with 'plum' parts, unless there was something 'wrong' with the process, as I recall a few years back one of the semi autos came through with plum frames as noted above..................
and yes, in time, various metals ,due to chemicals, ultraviolet light, ,etc, turn reddish, and Winchester and their 'nickel steel' was one of the culprits.
So look carefully at the entire guns finish, polishing,etc............no washed out holes, roll marks, rolled over corners, and edges, or especially pitting under the surface, dead giveaway of a 'reblue' gun or parts.
