These type and size of sailboats can be found quite easily. They measure 9″ x 2.5″ x 12″ and come in different hull colors, usually blue or red, and have variations in the sail color or name. This example is NOS. They were produced throughout the 1950’s by Keystone Wood Toys as inexpensive options to their larger sailboats. Ads of the time begin to show younger children playing with these type of boats in backyard pools. Each variation had its own model number and to this point I have not identified them all. A new one pops up every once in a while.
From my private collection.