Well, BelOMO made over 3 million units, plus KMZ around 61,000 so it's not that uncommon Yes the KMZ is more uncommon I guess but the release numbers are still huge. Mostly you get a modernized version of EM with plastic top in later BelOMO models and some changed dials, otherwise the same camera. I am still trying to find the late version without the selenium meter, but CDS instead.