1. • According to consumer guide sources 

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     , RN numbers like 83051 fall in the mid-1970s to late 1980s range for American sportswear companies, based on historical FTC registration trends.
2. Correlating RN 83051 with Era Indicators:
• RN 50000 was cited as being issued in the mid-1970s.
• RN numbers under 100000 were used through the 1980s and into the 1990s, but lower five-digit numbers point to older original registration epochs.
• Given RN 83051 is well above 50000 but below 100000, this suggests manufacturing likely occurred in the late 1970s to early 1980s.
3. 31" Long-24" Sleeves-19" -Across Chest.
4. 
   

Unkown If Womens Or Mens Sizing!

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