Cast iron centerboard.

Optional shoal keel draft: 5.42ft / 1.651m.
Semi skegged rudder.

Mast length: 9.85m/32.32′
Forestay: 10.9m/35.76′
Thank you to Raul Aranovich for supplying information and a brochure.

A keel/CB version was built from 1968-1972 called the Neptun 212.
SA = Jib and main.
Thanks to András Clér for information and brochures.

SA = Jib and Main
IOR rating = 21.70 feet
Thanks to András Clér for information and brochures.

Thanks to Ken Heaton for supplying information and pics of the C&C 57.

Information above is for the center cockpit model.
Optional ketch rig SA: 936 sq. ft.
Also available in aft cockpit:
LOA: 43.67′
Displacement: 23,000 lbs
SA sloop: 882 sq. ft.
SA ketch: 963 sq. ft.
Fuel: 75 gal.
Thanks to Mickey McNicholas for providing information and a copy of an original brochure.