Looks like a VDS Zeehond. These were either homebuilt or else available from very many boatyards
of various provenience. They received various rigs and hardware
. The ones I know were all steel
Similar sailing qualities to same sized Roberts, etc.
Clean ones fetch 40 to 60k EU money
. Vulnerability: the rudder
. Also the rig, where the hull
was built very "strong" (=too heavy).
They do not go upwind too great, they are actually quite beamy and displace some water
. If you think you will be sailing upwind heaps, look for a deep draft
one (they came in various keel
Very often, unless professionally built and well maintained, they are high maintenance
If you are looking at a steel
one, avoid wood overlaid decks and any wood trim on the deck