OK, let's see if we can clear up things....
.....early B-52's used a different stylus adjusting gauge:
....with the B-55 the arm lift segment also changed - on later B-52's as well - and therefore the stylus adjustment gauge:
Both of them can be downloaded from the 'History' section here:
https://www.lencoheaven.net/forum/index.php?topic=15781.0By the way: interesting to see that the design of the headshell is different - at the end the geometry is the same - but not on the stylus adjustment gauge !
Kind regards
Max