Looks like some press photos of early EC12 racing in FL. In one of the photos you can easily see sail #1. Photos are from Golden Triangle MYC.

http://www.ebay.com/itm/270962079200?ss ... 1438.l2649

and

http://www.ebay.com/itm/280868487563?ss ... 1438.l2649

Nice find, Mike. I have advised Jim Black of this. There may be more. Seller is out of Lakeland TN. The first EC12 NCR was in Memphis.