DON vs. DNN?
Tachymètre vs. Tachymetre?
Different pushers?
Is one a service dial(right) and the other original(left?)
Ok I give up. I can't figure it out.
One is early and the other late in the production. One came from a major auction house and required about $1500 of work to the insides to bring it up standards. Unbelievable lack of curating but it's what I expect from them.