I have just come across the following boat for sale, its a former North Sea fishing vessel converted into a sea going motor yacht. Its a Dutch Nortsea Botter "Stella" UK 51.. The boat was orignally built in 1917 and was fitted with an ALFA ROMEO 160hp motor and gearbox in 1958 ,the engine being rebuilt in 1989. It is currently berthed in Amsterdam.
For more info see
Bowcrest Marine -The Dutch Barge Specialist