[marbro]

I've had 2 of these "Big M6" Leicas (as they are referred to by collectors). Most sources say that when the company structure changed from Leitz to Leica and the factory moved from Wetzlar to Solms it was decided to just use the M6 since the red dot now read Leica. It was thought that Leica over the M6 was redundant. It didn't last long and the Leica reappeared above the M6 after a very short time. See Gandy's website or Laney's books for details. Hope this helps