Do we have any idea as to who made this suit? Was this one of the Elstree suits or one of Ainsworths?
My understanding, and I could be wrong, was that Elstree made some suits prior to AA. but the Vac former was not up to the task of making 50+ suits.
The idea that Sandies had only one snap makes sense and falls in line with the fact that changes were made when they got to the studio, ab buttons, sniper plate why not an extra snap for adjustment.
I guess we will never really know as the documentation doesn't seem to exist although I live in hope that some more discoveries will be made.