Gary Astridge has one or two that are just like Ringo's. Bun Carlos had one with the badge in the right place (not sure on the depth) at the last Chicago show that he had just acquired. Not sure how many are out there in total but probably not a lot more. Even the later 1964-69 models with the slightly different build are a bit tough to find although not nearly as rare as people used to think ( in the pre-internet days the rumor was that less than 200 OBP JazzFests were made in total, that was one reason they were so expensive, even then, and the fact that it's now obvious that there are a LOT more than that number has never really brought the price down).Here's a not so great picture of mine....5.25" deep if I remember correctly.
Mine is same size as yours KO, 5.25".