The Model 1s redesignated after modification to seat eight passengers. Dolphin Model 3 The third commercial Dolphin built as a luxury transport named Lesgo with seats for two crew and four passengers for Powel Crosley Jr., powered by 2x Pratt & Whitney Wasp Junior A engines. Later impressed into the RAAF as A35-3. Dolphin 113 One aircraft named Jade Blanc V for French clothing manufacturer Armand Esders (who also owned a Bugatti Royale) similar to the RD-4, powered by 2x Pratt & Whitney R-1340-S1H1 Wasp engines. Dolphin 114 A single Dolphin built to order for Philip K. Wrigley, powered by 2x Pratt & Whitney Wasp SC1 engines. Dolphin 116 One aircraft for the Armada Argentina (Argentine Navy), powered by 2x P&W R-1340-96. Dolphin 117 One aircraft initially named Rover, bought by William E. Boeing, which ended up in CAA (forerunner of the current Federal Aviation Administration) service. Sole surviving example, painted in USCG markings. Dolphin 119 Two aircraft built for Alfred Gwynne Vanderbilt Jr. and William Kissam Vanderbilt II and operated from the yacht Alva. One of the two (which is unknown) joined the RAAF as A35-2. Dolphin 129 Two aircraft ordered by Pan American Airways for its subsidiary (at that time) China National Aviation Corporation, powered by 2x Pratt & Whitney Wasp S3D1 engines. One crashed in heavy seas and the other was destroyed during or shortly after the Japanese invasion of China. Dolphin 136 A single Dolphin, powered by 2x Pratt & Whitney Wasp Junior SB engines, ordered by Standard Oil and later impressed by the RAAF as A35-1. FP-1 Several C-21 aircraft loaned to the U.S. Treasury Department for border patrols during Prohibition. FP-2 The two Y1C-26 Dolphins during a brief attachment to the U.S. Treasury Department. FP-2A The designation used by those Y1C-26A aircraft that were attached to the U.S. Treasury Department. FP-2B The two C-29s when in use by the U.S. Treasury Department. RD-1 One aircraft, powered by 2x Wright R-975E radial engines, operated by the U.S. Navy. RD-2 Four Dolphin aircraft of two distinct types. One Aircraft similar to the Y1C-21 and powered by 2x Pratt & Whitney R-1340-10 engines, for the U.S. Coast Guard. Two were U.S. Navy VIP staff transports similar to the Y1C-26 powered by 2x Pratt & Whitney R-1340-96 engines. The final aircraft was completed for the U.S. Navy as the first presidential aircraft, for Franklin D. Roosevelt, powered initially