SECO RN 52569 Printed T-shirt American Football Pattern Vintage Size S Made in Mexico 1970s (based on print and multiple listings) ■ Sizing: Shoulder width: 44cm Body width: 47cm Body length: 65cm ■ Condition: Overall signs of use and age appropriate for its age. Small hole on the right shoulder. ■ Notes: The catchphrase is like the origin of the technique used by the protagonist in the manga "Eyeshield 21". Purchased from a used clothing store. Has not been worn for about 5 years. Multiple used clothing stores list it as "Made in the 1970s-1980s" with a market price of "around 5,000-6,000 yen". The "RN 52569" on the tag also matches.