Hi John,
If the page you have is a copy of is out of Geoff's book, then both the page illustrations he shows are from the 1950's catalogue. [Edit: I've just noticed you quote 75/7 as the code - this is the 1950's code for "Priory".]
He says, in the section under 1950's catalogue - Lanterns, page 101, second sentence, "In many cases the names were the same as the pre-war originals, but the shapes were changed."
On page 31 of the text he also discusses the metal used and the method of construction. The frames were made by a local firm, George Hettdem and Sons. Originally, the wire was round section and later square. In the 1950's the frame was made using spot welding techniques and an expensive non-rusting nickel wire, which when finished gave an antique appearance. (I have paraphrased Geoff's section)
By looking at the photo's of the 1930's versions, shown on pages 98 -100, it is fairly clear that the wire was connected traditionally using metal (wire) clips. The pre-war "H7 -Priory" design is nothing like yours, but the lantern - H3 - called "Abbey" is similar as it uses the circles, but all the other metalware is clipped directly to those circles.
I hope this helps, Nigel