I got four of these today in a major trade. They're for 80's kits and are operated with a drum key. These are the tom arms with the Pearl Logo and then the Japanese and USA Patent Numbers
I have three long arm and one short arm, and all four have one memory lock. Everything works smoothly and as it should, no rust but a little polish would be good.
Since I don't know what they're worth, you tell me.
Cassidy