First of all..Thank you for very useful and exiting site. I use it a lot.
Being owner of an Offshore 8 meter designed by van de Stadt, I am of course concerned about the data and information about the boat.
Obviously the displacement given here at Sailboatdata.com must be wrong. It says 9000 lbs./ 4082 kgs. I am not sure about the correct value, but I believe about 2200 kgs. I hope this will be corrected.
The boat was built by Tyler boat, but also built by van de Stadt under the name "Bries". At least this is the information I have.
It seems to me that the photograph is of an Offshore, but the drawing is a Bries. I believe this because the drawn version has rudder outside while photograph has an underwater construction. Again, only my theories.
Looking forward to follow your site and hopefully you will change the displacement data.