We’re told the first boats were built in Aluminum in the Netherlands before a plug was made for fiberglass construction by Ta Yang in Taiwan.
Also available with a Peugeot 52 hp diesel.

Specification source: Sailboat Buyers’ Guide. Compiled and edited by Alan Chappell, © 1983 by Sea Shore Publications. 

Similar hull to the Fisher 30 but with a little more beam for more interior.
Sail area:
-Main: 13.93 m² / 150 ft²
-Jib: 11.61 m² / 125 ft²
-Mizzen: 5.11 m² / 55 ft²

Developed from the Southerly 135 Mk1 with an extended stern and bow sprit allowing her to be rigged as a ketch.

LOD: 14 m / 45.67 ft
Sail area above includes:
-Main: 41.8 m² / 450 ft²
-Genoa: 69.67 m² / 750 ft²
-Mizzen: 12.54 m² / 135 ft²
Optional Staysail: 22.3 m² / 240 ft²

Wilf O’Kell, a NZ designer who later moved to Australia.
Also designed to offer a flush deck option.
Sail area above is 100% fore triangle.
Main: 410 ft²
Mizzen: 213 ft²
Genoa: 615 ft²
#1 Jib: 354 ft²
#2 Jib: 190 ft²
Mizzen Stay sail: 460 ft²
Storm Tri sail: 160 ft²

Specs above are from Bristow’s Book of Yachts, Sail & Power, 22nd edition, 1991

Also available with a cutter rig.

Claimed to be the first fiberglass production multihull built in the US.
Ted Irwin’s only production multihull design.
Similar to Arthur Piver’s Victress 40 design, it has been said Irwin consulted with Charlie Morgan, Morgan Yachts, on this design and at the time, Arthur Piver was working for Morgan.
All interiors were custom built and vary from boat to boat.
Bruce Number: 1.16

Deck layout and interior varied with each boat.

Sail area:
Main – 46.5 m²
Genoa – 83.0 m²
Jib – 46.0 m²
Mizzen – 13.7 m²
Spinnaker – 180.0 m²
Storm Jib – 14.5 m²