They definitely found their way on to the Power Jazz Basses as stock,(E9 serials I think) but not every year. (Hence wanting to get one or two for my E7 serial PJ’s without them). So, maybe as a Japanese OEM, they are, or rather were out in the wilds! They are really solid bridges and, as I mentioned above, have a tidy quick release; a key-hole method rather than slots in the rear section.