●Brand Rolex ●Model “Lefty”left side crown Oyste Perpetual Datejust Ref.6105 ●Manufacture　Age 1962 ●Material for The Case 18K Solid Yellow Gold for Case an Back Case ●Dial 　Original 100% Factory Original Untouched Condition With Alfa Hands ●Size 37㎜(For The Diameter Without Crown)×41MM(Lug to Lug) ●Movement Caliber.745 based Semi Bubble back movement "Cal.645" Breguet Hair Spring. Screw Balance Wheel. 18000vp/h 17Jewels ●Condition All Working Order .Red Date counter is fine Accuracy time is 10-15 Seconds in a day. 2 Rubber of back case and Crown tube was already Exchanged by our self. ●Story This Lefty Rolex Datejust was sold at $10000 in Cristie's Auction of 2004's This left model was developed at in middle of 1940 as first lefty "bubble back" model But all lefty model was basically made as special order and optional from requested client at that time. The feature for mechanical structure is the special metal plate setting between the Dial and movement Very rare and never find in the world. But there are a lots of fake lefty. The it need strong judgment by professional expert. Then this one is very famous one sold by Cristie's auction.