FACTOR X is a 28 Winslow Four-Sum, designed by Ralph E. Winslow in 1944 and built by Davies on City Island, New York in 1946. FACTOR X has had a single owner for the past 35 years and underwent an extensive professional rebuild by New England Shipwright in the 1990s with finish work by FL Tripp & Sons. FACTOR X’s planking is quarter-sawn Douglas Fir on white oak frames with bronze screws (the boats existing original planking that is above the waterline is rare quality Oregon pine and Douglas fir that were full length planks carried-over from US Navy wartime supply given City Island’s role in building wartime wooden mine sweepers.FACTOR X has a Yanmar 3GM 27-hp was installed at the time of her rebuild. Despite having low hours, it was removed and fully serviced two years ago, being reinstalled with a new shaft, new engine mounts and a plastic fuel tank. A year ago, the fuel tank that was installed in the rebuild was removed as a preventative maintenance measure and replaced with a new plastic tank that is easily inspected. The mainsail is full-batten Quantum that is in good condition and the Quantum 135% genoa that is on a Schaefer roller-furler is in excellent condition having been purchased in 2019. Her 45′ mast and boom are varnished Sitka spruce and constructed by Elk Spar of Bar Harbor, Maine at the time of her rebuild, using plans from Mystic Seaport archives. FACTOR X is being offered at a very attractive and realistic price far below her true replacement cost. Come have a look! 29,900.