The first one of these we have had for sale for several years.  This is a circa 1985 ver2 Canada version.  Optically perfect.  Shows light signs of wear on the barrel.  Takes an E60 filter.  #3439943
 
More info on these lenses here:  
leica.overgaard.dk - Thorsten Overgaard's Leica Pages - Leica 75mm Summilux-M f/1.4 review, sample photos and article