David Walter Double Pendulum Clock Repair Part 1 - Calendar Problems 

Fantastic. Thank you for taking the time to produce these videos. Facinating to watch your explaination of the mechanism and the issue. Thank you for sharing your fantastic level of knowledge and understanding.

Enjoyed this greatly. Loved hearing you describe your thoughts as you tried to fault find. Makes video more interesting/educational.

Fascinating, and extremely well explained.

Good to hear your thoughts and talking us through this. Mind you this I s indeed a quality piece of work.. I wouldn't take it on but reminds me of good French engineering... Bravo.

Very well presented. Elegant looking mechanism. From watching your 'vlog' . I'm interpreting a design flaw. As presented. Waiting on round two.🕰🕰🕰

If I'm understanding this correctly, the date mechanism is normally driven by the movement, and this results in no issues. If the time is moved forward by hand, and if the date hand is already on 31, it causes the date mechanism to become over banked and locked, making it unable to return without technical intervention. The owner of the clock should have definitely had some idea what they were doing that caused the problem, IMO. From the sound of it they had it happen several times. I was really hoping the adjustment you did to the date rack would have fixed the issue but it was not to be.

What an amazing clock.

Great job Tommy - just wondering would this 'forced hand lock' happen If the calendar wheel had less teeth (ie 42 instead of 44) ?

Hermoso!!!!!

Would it have also been a viable solution to add something in that very last tooth of the rack to prevent it from being engaged? Essentially the same solution. Preventing that calendar wheel from engaging into another tooth but allowing just enough to disengage the catch paw?

Isn't that mechanism still used in current clocks from DW? Perhaps they have an 'erratum sheet'....?