Hello DII community, maybe it s OT, but maybe somebody can help. I can?t find any info of SAILBOARD windsurfer. S.N. 4639240682 /so I suppose can be June 1982?/. Another sticker proudly says: 3x World Champion, Oen Class 1981 USA. Probably it wasn?t DII, but hull is rounded enough. I ll appreciate any info: comments, memories, data, brochures. Thanks.