I was placing a 54R extractor on a spare Vickers lock and noticed this marking on top of the extractor. It appears to be "WLN". Does anyone recognize this marking? Oh, take a look at the second picture. It will make any knowledgeable Vickers owner/shooter cry uncontrollably. It also looks like I'm also in need of a .303 gib, gib spring, and gib retainer plate. Any ideas where I can get these?