DESIGN HISTORY:
John Arnold Surfboards
John Arnold Surfboards started in South Australia in the late 1950s and, principally through licensing O’Neill Wetsuits (USA) and Golden Breed clothing (USA), was a major company in the 1960s Australian surf industry.
An advertisment for John Arnold Surfboards, late 1969 lists the shapers as Wayne Lynch, Wayne Dale and Sig Kwiatkowski. 
See below.
I assume Dale or Kwiatkowski were responsible for the majority of the Involvment production boards as Wayne Lynch had a number of interstate competitive committments and was also travelling the world with film producer, Paul Witzig. 
An J.A. advertisment late 1970 notes the 'designers' as Wayne Lynch and Wayne Dale and they are available in "All states of Australia -  East and West coast USA - England - France". (reference?)
A Klemm-Bell Sufboards, Torquay, advertisment for mid-late 1971 offers "Wayne Lynch Hand Shapes and
Designs". (reference?)
Presumably at this time the contract with John Arnold Surfboards had ceased. 
Wayne Lynch subsequently shaped boards for Rip Curl Surfboards, Torquay.(reference?)

Wayne Lynch
Said to have single handedly revolutionised backhand surfing, Wayne Lynch won the 
Bells Beach Junior Title 1966, 1967, 1968 and 1969.
Australian Junior Men’s Title 1967, 1968, 1969 and 1970.
European Title in 1968.
After an outstanding competitive record as a junior, he began shaping circa 1967, see below.
He starred in Paul Witzig’s films Evolution (1968) and Sea of Joy (1971). 
In Evolution (shot over a period of 12-18 months), Lynch rides at least seven different boards, illustrating the rapid design changes in this period.

COMMENTS
Note that "Invovlment" is spelt incorrectly - should be Involvement.
 

REFERENCES Other John Arnold Surfboards #103 1969 Wayne Lynch Involvment 7ft 9'' Books  Carter (1968)Cover photograph with Keith Paull (going right). Paull was the 1968 Australian champion, Wayne Lynch the Junior champion. Nat’s Nat (1998) page 177, and following. Magazine Ad : Surf International Magazine1969 Vol 2 #6  Film  Evolution (1968) Paul Witzig Sea of Joy (1971) Paul Witzig On Any Morning  (1974)  David Sumpter Fall Line (1979)  Nat Young CONDITION: 6

Image left. Finish coating John Arnold Surf Machines - Wayne Lynch International Involvment Model, Adelaide South Australia, circa 1969. "Finish coat. But it's inside that counts. And it counts, when groovy guys like Wayne Lynch, Wayne Dale and Sig Kwiatkowski get together with the J.A. team. Time you started counting...into the 4th dimension with a Wayne Lynch 'involvment' model or a J.A. surf machine. Ask at your local surf shop or contact John Arnold's Surf Shop 142 Gawler Place, Adelaide, 5000 Phone 23 5505" Image and text from Surf International Magazine Volume 2 Number 6, circa 1969. Page 2.

Image right. Simplex I Fin system. "No bolts, keys or any hardware. So simple, the fin can be changed in seconds. The precision box allows  six positions over a five inch adjustment span. Three fin shapes in glass filled nylon,  colours green, blue, red, yellow, white and black. SIMPLEX Fin Systems 142 Gawler Place, Adelaide, 5000 Phone 23 5505" Surf International Magazine Volume 3 Number 3, circa 1970. Page 2.

Image right: Adjustable fin and fin box with fore and rear locking clips. Burfrord Surfboards, South Australia, circa 1969. Contributed, with thanks by Mike Brown, Adelaide, January 2007. Mike noted The Burford fin box and fin has no stampings. I reckon Don had these made up. My Arnold/Lynch boards which have the same setup are identical, but some fins have 'Made in Australia', others haven't.