as the special 3 register diver autavia of jim's post below is made handicrafts, so the prototype autavia dials and cases, some special nos calculators and also the blue montrals like eboy 2648651116 are done handycrafts. i have seen the source for these dials and cases running around on several watchfairs, selling his stuff. you can identify for example the special montreal dials by the missing date window and the small chronohands are diffrent and and and...