must be a Juno.
LOA 6,78m
LWL 5,45
Beam 2,00m
Draft 0,95m
sail area 18,4m2
Designed for amateur-building,
for inland waters incl het biggest in NL, the IJsselmeer
design: E.G.van de Stadt, 1951
van de Stadt was quite an innovative designer, experimenting with plywood (1940, first worldwide), with free-hanging rudders, with light-displacement sea-racers (like the 60-foot planing maxi, the Stormvogel, 1960, taking line honours in the Sydney-Hobart).
Also one of the first to use polyester in boatbuilding (the Pioneer, 1959).
The design bureau still exists (vd Stadt & Partners), and most active dutch boat designers learned how to design as apprentices with van de Stadt....
Your family name is very dutch, mr Visser
regards
t