Originally posted by Not a Number I have 3 genuine OEM adapters. Two made in the Philippines and one manufactured in Japan. The Japan made one is labeled "Pentax Japan", not "Asahi Pentax Japan" as the earlier ones. My lenses align to about the 10-11 o'clock position on all the adapters. I thought perhaps it was only the Philippine manufactured ones that were off so I acquired the Japan made one.
Not a big deal but sometimes I get obsessive-compulsive over little things like this.
Mine is Made in Japan and says:
ASAHI PENTAX on the top, and JAPAN on the bottom. The surface facing the shutter is coated black where the cheaper KALT isn't. The original box that came with it says, ASAHI PENTAX in red letters then MOUNT ADAPTER K in black. It has a notice at the bottom saying, Manufactered by Asahi Optical Co. LTD JAPAN. There is no date or part number or other info.
At the moment the only M42 lens I have is a fungus damaged Yashica off my wife's deceased mother's 35mm rangefinder so I don't know which way the top of a Pentax would end up on this adapter or the KALT. I typically use it with my M42 extension tubes and an M42 Bellows to do Micro work (> 1:1).