126 is not in the same catagory as 110 or Advantix, it was about the same size as 135mm just square and Nikon and Kodak made decent 126 SLRs. Kodak made a few higher end fixed lens 126 cameras with good lens. I always though the flaw was the plastic cassesstt which could distort in hot weather.
Nikon made a 126 SLR? I know Ricoh did, and so did Zeiss Ikon and Rollei.