Awesome post, I have 4 active circa early 1960 B&Ls on rifles I use all the time. Two of my Balvar 2.5-8x's are mounted on a 243 and 30-06. I have a B&L 6x dot on a 223. Amazing how the bullet hits where the dot is out to about 300 yds, no waste of time targeting. And I just put the fourth old B&L 6x with straight, fine cross hair on an new 223 build. I consider my 1970s Leupold's 12x and 6.5-20x as "new" and yes, I have a recent Vortex Diamondback addition. BUT my best vintage scopes are 1960's B&L straight tube 6x on a custom build Mauser 243, and 8x on a Pre'64 Win 264 Mag, using B&L adjustable bases. I've shelved these two older ones but my Dad took many, many, muleys, antelope, and coyotes with these old optics. I suspect that most of these old scopes can shoot better in the field than the individual shooting them.