Virtually identical to original vintage knobs
I just got a 1989 ProCo Rat and it only had 2 of the original knobs so I started searching online to look for used ones and was not able to find any, but I found two sites that made reproduction knobs with Small Bear here being one of them. After using my caliper to check the measurements on the original knobs, I found that Small Bear Electronics seemed to be closer in size to the originals so I bought 3. Once I received them, they indeed are virtually the same size and the best after market reproduction knobs for my 1989 Rat!