This is a resin and white metal ship model kit.
Yankee Modelworks of the US is a maker of fine full resin kits, resin conversion kits, resin detail sets, and photo-etched metal detail sets.
Although small by today's standards, the Balao class of Fleet Submarines carried the fight to the coast of Japan. Their mission along with the Gato class submarines was to destroy the Japanese merchant marine ships in WWII.
The Yankee Modelworks kit measures 10.5 inches long (26.67cm). The kit's small size does not mean less detail, however. The deck and sail are reproduced to the exact plans used by Electric Boat. The sail has all the fittings needed to build any Balao class boat of the period. The hull and sail are molded together as a single piece casting. Resin dive planes and a photo-etched brass sheet are included.