40mm Transparent hollow-out dial Self-produced carved hollow automatic mechanical movt,exquisite stream cloud carving,with wide -faced metal Roman indexes, retro blue steel hands.A collision of modern and classicality,creating a different transparent mechanical beauty. Transparent Caseback & 80 Hours Power Reserve AGELOCER Cal.A4710 Self-produced Mechanical MovetTwo-way Winding System, Power reserve 80 hours long,Frequency 4HZ(28800 v.p.h),Equipped With 28 Ruby BearingsIncabloc triangle shock absorber.Exquisite transparent hollowed-out carving, 316L Stainless Steel Case In the 193 process planning,design,precision machining and production process,It gradually rejuvenated,experienced 32 hours of processing carved,Eventually condensed into 34 grams slim case on your wrist,Thickness only 9.5mm. 316L Stainless Steel Strap/Cowhide Leather Strap Safty Double Lock Clasp Milan steel mesh strap with double flip interlock clasp,the new security buckle design,Double protection,solid and reliable.Embossed calfskin,soft and delicate leather;Combined with the german stiching technology,hand-wrapped,With exclusive brand high-end single folding clasp buckle,Experience a comfortable wearing experience with you. POSITIVE BACK DETAIL BAND How to maintain this mechanical watch? When using for the first time, please manually wind up the watch to get enough energy to keep it working well, energy dial shouldn’t exceed 35. If you wear the watch less than 8 hours a day, please manually wind up your watch to keep working well. Please avoid wearing it in hot water or under thermal steam environment, such as hot bathing, hot springs, sauna, etc. Battery free, as you wear it, it will automatically continue to wind up. If you wear it more than 10 hours a day, you won’t never to manually wind up your watch. Product Specifications Case thickness: 9.5mmWatch diameter: 40mmStrap length: 170-205mmStrap width: 20mmWeight: 68gWaterproof: 50mKinetic energy reserve: 80h Tips: All sizes are manually measured, there is a reasonable error, please prevail in kind. Schwarzwald World time Spirit Moon phase Big Bang Tourbillon Buying Options Buying Options Buying Options Buying Options Buying Options Add to Cart Customer Reviews 4.9 out of 5 stars 8 4.7 out of 5 stars 6 — 2.0 out of 5 stars 1 4.3 out of 5 stars 4 4.0 out of 5 stars 26 Price $217.54$217.54 — no data — no data — no data — no data $759.99$759.99 Mirror Material Sapphire Crystal Sapphire Crystal Sapphire Crystal Sapphire Crystal Sapphire Crystal Sapphire Crystal Strap Diameter 25mm 21mm 20mm 20mm 24mm 20mm Case Diameter 41.5mm 42mm 40mm 40mm 44mm 40mm Movement Cal.A4910 Mechanical self-wind Cal.A4610-2 Mechanical self-wind Cal.A4610 Mechanical self-wind Cal.A4610-2 Mechanical self-wind Cal.A5500 Mechanical self-wind Cal. A9001 Manual machinery Water Resistant 5ATM 5ATM 5ATM 5ATM 5ATM 5ATM Features energy reserve, luminous,skeleton waterproof, calendar，world time energy reserve, calendar energy reserve, Moon phase,waterproof 24 hours display, luminous skeleton,Tourbillon,Double way winding system