I wanted to share some pictures of the markings on my MK. VI in the hopes that somebody can help me figure out about when it was made. Most examples I've seen online are stamped with a date somewhere, but on this gun I see none. The 4 digit number is the guns serial number, and I feel like the crossed out numbers on the frame indicate that the gun was arsenal rebuilt at some point but I could be mistaken. Ive read that the "N" stamp on the butt may indicate it was navy issued. Does anyone know more about that? Just today I noticed this "M" on the grip panel. Any significance to that? ..and one last pic just because it's a great looking revolver. I would appreciate any info at all. Thanks!