Hercules
Senior Member
No. All manufactures moved serial number to the barrel around the same time. They were ordered to. And the numbered safeties likely started sooner (I would be willing to bet around the same time that Mauser and Sauer started). Here are some pictures of a B block with what appears to be a shortened safety.
View attachment 247932View attachment 247933View attachment 247934
Yes I realize manufacturers moved Serial at around same time. I always thought one of the reasons was the need for more sniper production. Easier to read the serial. Like when BYF started hand stamping serial on barrel. Just something I would consider when I was looking at the various sniper rifles. Sometimes on turrets they work the receiver down a little before putting front turret on receiver, which made serial hard to read on some. Just a theory. I am sure the various letter blocks ran through the factory at same time. So, no exact letter block. Would be some overrun. All these snipers are great. Like the SC maybe more than some of the others.