he HM2 SV edition gives away part of the secrets and inner workings of their Horological Machine Number 2 by using sapphire crystal to cover the entire front of the timepiece as you can see on the picture above.Sapphires hardness is second only to diamond, which makes the whole top half of the case (the most exposed half) extremely scratch-resistant. This is a timepiece that will keep its good replica chopard Mille Miglia Rubber Strap watches looks for a very, very long time. The 3.6mm thick sapphire crystal consist out of a top plate that has been constructed out of three separate parts. It takes up to 55 hours to create just a single top plate of sapphire.
Actually, Stettler in Lyss (Switzerland) was the only manufacturer of sapphire crystals that accepted the challenge and managed to fulfil this task in a perfect way, so I guess they are worth mentioning here To replica audemars piguet watches ensure maximum light and visibility through to the movement, the two dials minutes and date are also in sapphire, sapphire disks lightly brushed to a perfect translucency ensuring full legibility of the polished silvered numbers while allowing maximum light through to the engine beneath.The movement of the HM2-SV, has been developed by master watchmaker J.M Wiederrecht, it feature an instantaneous jump hour, concentric retrograde minutes, retrograde replica breitling Blackbird watches date and a bi-hemisphere moon phase.