pierrec45 said..Bic & Dufour were two different things, til they merged (1980?). I think the two quite different products went on for a couple of years.
Dufour was a flatish hard plastic board, round-hollow at the back with sharp edges.

Bic models were the large full plastic-ish thing you brought out in this thread. If I recall - me was young - both had nearly untieable booms, and certainly worse even than the Windsurfer. Both was a bit of a fugly...

Quite right Pierre. Bic had a "Bic Swing" too which was the Dufour Wing, but if I remember correctly, it didnt have the same edging at the seam (which I thought was usually red - I havent seen a blue one like this pic), and the centreboard "almost" retracted.
The 250 was the bread and butter of windsurfing schools everywhere because it was practially indestructible. A few years later Bic released their range of music boards - Bebop, Electric Rock, Jazz, Allegro, Hard Rock, Calypso etc. Bamba (Course racing board) was a few years later again.
They were the good old days.