On the dyna,if it has a big r badge it would be 76 or later,early ones from 60's have script badge and another badge reading custom built.eary throws had clockface ,were rounder than later ones,the bottom rim changed also,something about making room so the rods at the snares were easier to access.

Hi Robert,

The Dyna-Sonic has one of two badges, the oval and the square "Big R" . The oval badge has 3 different designs, all 3 have the words Dynasonic on the badge, as well as the custom built and serial number. The main difference is in the thickness of the letter and fonts. The Big R stamp did not have the words Dyansonic on the badge, and there was various differences to those.

Ooops, forgot that the very early Dynasonics had paper badges on the inside of the shell..

Zildjian cymbals have all kinds of different stamps, K's do have the letter K on them on some stamps, earlier ones, may not. Drumaholic will chime in. Zildjian A's don't have an A on them, I believe most older Zildjian's that don't say K, Constantinople are A's, but I'm guessing. Weight, age and stamp will determine value.

Swivomatic Pedals are good pedals and collectible to the right person.

I'd be interested in your items, if you are selling the PM me.

BBK