


didn't know about the key and is very interesting.As I responded to crown comfort already: it is an important Lange and a great piece to own and admire.
Even the winding pin has engineering inside as it is a torque spanner ( Drehmomentcshluessel ) with a defined application of force (torque) to the watch.
Albeit being big it is still a top Lange in my book.
Enjoy it and thank you for the rare pictures of it in your post.
Best
Moritz
The Mother of all Langes at the time we did our tutorial on it during the very first Connoisseur's Akadamie. It just dwarfed everything else in sight!
Even the two main springs, the length of each one stretched end to end would be more than the height of the average man. The two barrels were stacked one on top of the other and these were not small when laid out on a table. I wish I still had the photos I took of the disassembled watch. It's quite surprising to see how everything fitted into the case; like having 13 people inside a mini.
Here's an interesting bit of information: if you ever lose the key, you can still wind the watch using the crown but it would take approx. 500 turns to fully wind it - ouch!
Perhaps you can measure its rate over the course of 31 days to gauge its accuracy.
Congrats to you for acquiring an incredible timepiece!
Cheers
fernando