Do you recognize this mainsail?

[stanirish]

believe it maybe from an Olympic or Olympian 21 sailboat?
(approx. Luff 19.67, Leech 21.75, Foot 9.75)

 

[FastOlson]

The chevrons indicate a winner at three nationals. The emblem looks like the "N" flag, but "flying" and set on a staff.
This is similar to the blue checkered Niagara "N" emblem on our former N-26 sloop.
Puzzling.

 

[stanirish]

Interesting, did not know that, thanks.

 

[Kermit]

Looks like a NASCAR flag to me.