A very popular sail in the heyday of sailboarding was the 1985 models that came with Mistral sailboards. The sail featured here was fully battened and had unique silver batten pockets!
1985 Mistral / Gaastra 6.0
1985 Mistral / Gaastra Full Batten sail 6.0
1985 Mistral / Gaastra Full Batten sail 6.0 - delamination at top clearly visable
1985 Mistral / Gaastra Full Batten sail 6.0
1985 Mistral Catalog page - note reference to the 6.0m2 full-batten sail at the top of the second column of text