In 1978 Ron Holland, at the time one of the most successful small racing yacht designers, designed the Super Seal 26 for John Baker's boatyard. Around 100 were built before Baker sold the rights to G.W. Parker of Boston, Lincolnshire, in 1983. Parkers continued production for a short while, progressively making minor variations on the design, mainly but not exclusively to the interior fit-out, and in 1984 Parkers retitled the design the Parker 27.
The Parker 27 remained in production until 1990, when the Parker 275 was introduced, this having a complete new moulding, with a slightly longer hull and more headroom, although still remaining very similar to the original Ron Holland Super Seal design.
The Super Seals and Parker 27's had relatively light keels, with most ballast internal. Parker 27 keels are quoted in different Parker documentation as either 136 Kg or 160 Kg in weight (ie 300-350 lbs) The Parker 275 had a much heavier keel, weighing 700 lbs, which was thus more difficult to lift. Finally the 275 became the Parker 285, in which the keel is lifted electrically. The Parker 285 was in production until Parker Liftkeel Yachts Ltd. ceased trading in summer 2009.
All these boats offer a remarkable combination of sailing performance and cruising accommodation. The hull has the majority of the ballast in the bilges, with a deep, efficient daggerboard style fin keel and fractional rig providing superb windward performance. Offwind the hull is also fast, surfing readily.