An awesome design from the past
Way before the vibrating cock rings had the vibrating part vertical instead of horizontal placed on the penis/cock ring Janne Kyttanen designed this one for me.
After this the iconic TENGA SVRs came to the market followed by their paiRing and the SVR versions of their sister brand IROHA.
Get your TENGA at https://eustore.tenga.co/collections/vibrating-cock-rings