Zella C was designed by Ottis Cutting and built in 1927 by L Benson, respectively architect and master carpenter at the Lake Union Dry Dock and Machine Works for Dennis Richard Cain. She was a gas screw yacht, with one mast, 37.75 feet Registered Length (42-feet overall), 11.4 feet in breadth and 4.6 feet in depth, of 14.76 gross and 12.89 tons net.