View full screen - View 1 of Lot 78. A fine and possibly unique set of three torpedo boat navigator's trio silver open faced watches with power reserve, and original fitted and numbered box, Made in 1912, Sold to the US Navy on 8 December 1917, and used on the US Zeppelin Airship Los Angeles (ZR-3)  百達翡麗 一組三枚 Navigator's Trio 銀製懷錶備動力儲存顯示，附原廠錶盒，錶盒印有編號，1912年製，1917年12月8日售予美國海軍，曾於美國齊柏林飛船洛杉磯號（ZR-3）上使用，可能為孤品.