I don't know if I am right or wrong but I always understand that match needles metering is like that of the FE and F2A is center the needle. I learned about the term since 1976 when I was reading a bunch of photographic magazine to research for my very first camera. And thus the Pentax KX is match needles and the K1000 is center the needle. Both the Olympus OM1 and OM2 are center the needle type.