The Sodergren Mk II and III are the same hull with different keel configurations.
These boats were the first 2.4mR design built in any greater number. It was built in Finland by Vene-Björndahl who later became the builder of the Norlin Mk III making Vene-Björndahl in effect the builder of the bulk of boats for the 2.4mR class. Vene-Björndahl became Charger Composites the present builder of the Norlin Mk III when Imma Björndahl, the founder of Vene-Björndahl retired.
Around 125 boats of this design were built.
