This is one of my favorites , Zenith cal. 3019 . I hope the pictures due it justice ;

The movement side without the oscillating weight (rotor ) it always gets in the way so I left it off for the picture



Here's the dial showing the calender . I swear the guy who designed this was payed by the part and he had a boat payment due ;



Although its one of the most complicated systems in use , the end result produces very little stress and therefore very little wear , giving years of reliability .



( be gentle with me it's my first time posting here ) Jesse

 

Glad to see another familiar name in the forum. Welcome Jessie and great first post!!

 

Thanks . I hope there is some interest in these . I get to see some beautiful and interesting stuff .

 

Yes, that's one of them. It's like one of those 3 dimensional jigsaw puzzles.