RARE VINTAGE Munsingwear Grand Slam Made in Japan Penguin Polo Shirt Size L Excellent condition Vintage/Collectable Colorblock classic penguin logo with tropical orchid and palm tree Made in Japan Era: During the 1970s and 1980s, some of Munsingwear's Grand Slam polo shirts were manufactured in Japan. These vintage shirts are known for their quality and unique styling 1/3 zipper closure Crewneck Short sleeves