Ebbets Field Cerveceria Polar 1950 Vintage Ballcap Size - 7 1/8 Great condition, only worn once! Made in the USA Description: Authentic reproduction of the original 1950 Cerveceria Polar ballcap. Hand-sewn from genuine wool baseball cloth. History: In addition to the four-team Cuban League, the island nation also had a lively amateur baseball scene. Many of the top teams were sponsored by companies. This club was named after the popular Polar brand beer.