Steve,
Thanks for reply,strange I did a search and found the book was published in 2009?
"The "Porpoise" : Australian diving technology the world copied / authored and researched by Des Walters ... [et al.]
Book Bib ID 4593118
Format Book, Online - Google Books
Description [Albury, NSW : Des Walters, 2009].
169 p. : ill. (some col.), ports. (some col.) ; 30 cm.
ISBN 9780959027723
Notes "Porpoise (compressed air) Diving equipment"; "For the professional diver and amateur sportsman..."--cover.
"This document has been a collaborative project between four members (Des Walters, Des Williams, Mel Brown, Tony Gregory) of the Historical Diving Society SE Asia & Pacific, to record the achievements of a unique Australian diving pioneer (Ted Eldred). Collectively the group was known as 'Ted's Army."--p. 167.
Subjects Eldred, Ted. | Scuba diving - Equipment and supplies. | Scuba diving - History.
Other authors/contributors Walters, Des
Also Titled Australian diving technology the world copied."
the article ends with"limited publication,for availability contact Des Walters at
[email protected], too I was hoping to get a copy for my collection,did you get a copy?
as for off topic reference to source of "gagnan regulator" I went to the source"The Silent World" in the first chapter , page 3 the air regulator is referenced as the size of a alarm clock,page 19 Emile Gagnan is introduced to us as an expert on industrial-gas equipment and at that time had a demand valve that was designed to feed cooking gas automatically into motors of cars,this is mentioned to be in December 1942.
I quess Mr. Nuytten read the same book as I did.
Sorry can't help you with your memory,"first thing to go is your memory and I forget what else."