Hi Ken ,My Oconnell is a hard cover which I bought new.
I used to belong to The British Marine Aquarist Association , still have the little lapel pin somewhere
Have a number of older freshwater hard covers one from 1958 which included a saltwater section.
A beautiful piece of bleached coral from my original sixties tank has travelled with me from England to Vancouver Island , over to Ontario and back again to Mill Bay ,maybe time to put it back in a tank
Mark , Again that name Frank de Graaf has a familiar ring , must put the thinking cap on and try to recall him . I believe he may have written articles for the magazines I used to buy back then !
Meant to say ,I really enjoyed your long post ,I know your frustration when a long bit of two finger typing disappears into the ether
cheers .............Dave