Divided spring-loaded frames depicted in your thumbnail probably date 1928-1940. Before 1928, printing-out frames were adapted for darkroom use, after 1939, England was at war and photographic supplies were difficult to obtain throughout the Commonwealth. Look at the glass from the side. If it is green, it means nothing (replacement window glass), but if it is white (colorless) without striations or air bubbles, then it may be Waterford and probably original (unlikely) in which case, I would peg the date circa 1935. They are well used, do the same.

Quote Originally Posted by Sean
Hi all,

I purchased these printing frames off an NZ auction site for around $18US dollars

They look pretty darn old and I thought I might hang them on the wall in my darkroom. Can anyone give me the date of these frames? I've attached an image of them. Thanks!