I agree with the prototype labeling for the 866 M, as i understand it these were offered to the Bund for trial and testing but never ordered or put in active use ? And never in the iwc catalogue. I wonder how IWC sold these, or did IWC give these to employees that developed them ? Considered of little value back then maybe, now it is something to be treasured. The way time changes perception…….
In my opinion one of your finest line ups, congrats.