Here's one for the brain trust. I have been offered a complete Vickers crank assembly with arms, etc. The assembly is marker VSM - so it's 1928 or earlier. The bluing is good, about 95%, but IMO is an old re-blue with all marking still nice and crisp and not buffed down or buffed out. The downer is that every part of the assembly (and I do mean EVERY part) is either stamped or electro-penciled "DP." The seller is telling me all the Vickers spare parts were DP marked when the weapon was taken out of front line service, but I can find no such verifiable citation anywhere. I know that there are two schools of thought, one being any DP marked part is junk, and the other school of thought that not all DP marked parts are junk. It looks good and does not exhibit any signs of excessive wear. Thoughts? Comments?