What is it?

I have been trying to figure out what this elegant ketch, christened Zwerver, is all about. She was spotted off the North coast of Brittany in the summer of 2009. Dutch flag, long counter, low pilothouse, what looks like wooden spars including bowsprit, black topsides and copper underbody paints, a high freeboard and real heavy weather oilskins: There simply are no faults. This seaworthy boat looks circa 60ft.
Click for higher resolution. Any ideas on who designed, who ordered, who built or who sails her? please comment!

[UPDATE]
Zwerver is modelled on the Orion 58 design by naval architect Peter Bosgraaf and built in woodcore / GRP sandwich at Adrie Pijnen Jachtbouw in Noord-Brabant, Netherlands.
Length Over All: 17.63 m
Load Waterline Length: 14.05m
beam: 4.51m
draught: 1.50/3.20m
displacement: 19.5 metric tonnes
sail area: 154sqm
build: woodcore / GRP sandwich
builder: Adrie Pijnen Jachtbouw
I received this wonderful photograph from Peter Bosgraaf to complete the enquiry: