A. Lange & Söhne 31 days power reserve ...

Post by **miki360** » June 4th, 2020, 7:55 am

Some engineering watch porn from A. Lange & Söhne ,key wind 31 days power reserve.Also notice how minute hand jumps...

bmsm · Post by **bmsm** » June 4th, 2020, 8:24 am

True, that is porn

nje2791 · Post by **nje2791** » June 4th, 2020, 8:40 am

Wow, a 4 metre watch spring. Amazing engineering solution to the power delivery. Thanks for sharing.

Thrasher · Post by **Thrasher** » June 4th, 2020, 1:59 pm

Amazing 13 foot mainspring

Post by **Tanukjaju** » June 4th, 2020, 2:11 pm

nje2791 wrote: ↑June 4th, 2020, 8:40 am Wow, a 4 metre watch spring. Amazing engineering solution to the power delivery. Thanks for sharing.

Imagine the poor apprentice watchmaker who has to uncoil, clean oil and recoil them.

Post by **tafari** » June 4th, 2020, 2:28 pm

a master piece, just amazing