Although you will probably never actually see most of the levers,wheels,and spring in the Grand Lange 1 calibre,lange's master watchmaker meticulously perfect them by hand. Afionados will appreciate the fact that not all of these lavishly finished parts are concealed.Fortunately,the sapphire-crystal back reveals the fascinating interaction of quite a few of them.Treat yourself to a close-up look.For instance at Pendulum in Bangkok