The Lange Zeitwerk is one of the more unusual watches, it is the very first purely mechanical wristwatch with both precisely jumping hours and minutes display. The main challenge behind the construction of this calibre was to deliver the enormous power which is required to push the minute disk forward every 60 seconds. Lange have solved this with designing a constant-force escapement, which sits between an massive barrel construction and the mechanism which powers the minute and hour disks. Basically there is a small "remontoir" spring which is "charged" every 60 seconds and then released to push forward the minute disk in a rapid movement.
The movement contains over 400 parts and 68 jewels. Due to its immense power consumption the reserve is only about 36 hours, so it needs to be hand-wound daily.
I have been wanting to own a Zeitwerk for years, my recent 50th birthday provided the excuse to go ahead with the purchase. This week the new tailor-made strap from Camille Fournet arrived, so now it's ready to go into rotation. :smug:
http://i1261.photobucket.com/albums/...ps7ztfivar.jpg
http://i1261.photobucket.com/albums/...psuvtjrd5o.jpg
http://i1261.photobucket.com/albums/...psf785ltml.jpg
http://i1261.photobucket.com/albums/...pse0uwp54v.jpg
http://i1261.photobucket.com/albums/...pslq9tylb0.jpg
http://i1261.photobucket.com/albums/...pse9jm5slq.jpg
http://i1261.photobucket.com/albums/...psq3puu7h9.jpg
http://i1261.photobucket.com/albums/...pstrifdjpp.jpg
http://i1261.photobucket.com/albums/...psnf2vxtpb.jpg