[ghh]

The authors contact page [1] mentions a Dutch mobile phone number, but the stamp [2] clearly shows Post Danmark was used in transport.

[1] http://rubenvandervleuten.com/contact.html [2] http://rubenvandervleuten.com/AtoB1.jpg

[andyking]

The address on [2] also shows Copenhagen (København).

People move around Europe a lot these days.