One Off 1/2 Ton in Sweden Mach 1 Half ton

Yacht Summary

  • Manufacturer: One Off 1/2 Ton in Sweden
  • Model: Mach 1 Half ton
  • Build Number: 11
  • Build Year: 1980
  • Lying: Espoo about 25 kms west of Helsinki airportinki, Finland
  • Price: Sold
  • Kontakt: Robi Gripenberg
  • Phone: +358 40 4142545
  • Email:
One Off 1/2 Ton in Sweden Mach 1 Half ton


Now at an AUTUMN sale price of only 10.000 euros. Call me and you will get a very nice well sailing boat.

A One Off Half Ton built for the Swedish Off Shore Worlds in Stockholm 1980. This is a sporty boat for a young sporty family or just for guys that want to race and have fun at sea at an affordable price.

Boat in a good condition taking into consideration her age of 40 years You will be positively surprised when sailing her and seeing the interior.

She is now taken up for winter storage in Espoo about 25 minutes west of Helsinki airport or from  down town Helsinki.

Also included is a winter storing cradle of steel

Designers Christian Bergenheim and Max Petrelius


Standard Specification

DesignerChristian Bergenheim and Max Petrelius
Rumpflänge9.30 m30'6"
Breite (max)3.20 m10'6"
Draft1.70 m5'7"
Ballast - Standard2,700 kg5,952 lbs
Verdrängung - unbeladen1,350 kg2,976 lbs
Dieseltank20 ltr5 gal (US)
Wassertank135 ltr36 gal (US)


Exterior Details


  • Mahogany veneer and Epoxy moulded by vacum infusion and polyuretan varnish
  • This boat does NOT need the normal annual wooden boat treatments that normally are done.
  • The boat was designed for the Off Shore Worlds in Stockholm 1980. She is a fast sailing boat and the previous owner had her for 20 good years and has been very pleased but now he bought a big X-Yachts.
  • The boat has a steel frame onto which the keel hs been mounted A sturdy construction similar to that of X-Yachts boats


  • Fiberglass deck

Sail Handling

  • Standard


  • Main sail Dacron, Furling Jib 90%, Spinnaker and boom ,
  • Genoa 110%, Genoa 130%, Genoa 150%

Mast & Rigging

  • Mast height 14.5 meters
  • 2 Spreaders
  • Bardunes


  • 1.70 draft the keel weighs 1350kg

Hatches / Portlights / Ventilation / Sprayhood

  • No Sprayhood

Guard rail / Anchor / Stainless Steel Fittings

  • Stern anchor mounted on aft pull-pit



  • Yamaha 9.9 hp outboard SAIL engine my.1997 on an ownn bracket aft at stern


  • Water tanks 100+ 35 liters
  • Toilet with holding tank and deck outlet
  • Sea water tap mechanical foot pump


  • Fridge new 2016 working on gas or 230 volt or on 12V battery
  • Stove 3 burner ENO


  • Speed, Wind ( not working), 2 compasses, Echo


  • NO