Wow. That makes these uniforms even more interesting! Thanks for the information!
Oh, and I should qualify my comment above about what I mean by "experimenting". The only pattern I am aware of from the early 1980s is TTsKO variations. While it is logical to think that they tried some other patterns, I've not seen any that I can think of. I checked a few sources and did not see any mentioned there either. Just TTsKO.
To me this seems like a variation of VSR, which is another reason I thought it was early 1990s.