The following images are of a couple 5.5 meters and a Westphal 28.
The restored 5.5 meter was named "Purple Haze" and it's pedigree has recently been traced to being the first 5.5 metre (and perhaps first racing yacht) designed by Britton Chance. Complex V (US-51) was built in 1963 by Vator in Finland and placed 3rd in the 1965 5.5 Worlds. She is currently on a trailer and in sailing/racing condition.
The other 5.5 meter was acquired in the fall of 2006 and it's history was traced to US-75 "Savage" originally owned by Al Cassel and competed in the 1968 Olympic trials in Newport, Ca. The boat was the only 5.5 meter designed by Bruce King and it had a unique mechanism to tilt the mast to windward that was hotly contested during the trials, but allowed. The boat is pretty much complete with spars/standing rigging, a full inventory of old sails and other gear, a custom cradle and flat bed trailer. This boat is under restoration and will be sailing in the near future.
The Westphal 28 is a fiberglass OD, hull #21, built in 1969. Since the class is long gone and the keel needed considerable repair it was decided to modify this boat for inshore/club handicap racing. The underwater appendages are being reconfigured from the full keel/attached rudder configuration to a fin keel/spade rudder configuration. Also, the sailplan/rig is being reconfigured to compensate for the underwater changes and improve sail performance. Lastly, the modifications allow the boat to measure in as a 5.5 Metre. This boat has been sold.