Original U.S. Vietnam War Named Special Forces ERDL Pattern Uniform Set - Blouse & Trousers Russian Awards Medals Badges Insignia with only minor differences

with only minor differences

traditional Chinese:

but the writing is clear

It looks to be quite similar to the TK-11 in almost all of its viewable features and appears also to use common 4-pin DIN type com connectors like all previous Chinese flight  helmets

The interior crown of the cap has a faded gold makers mark that reads:

Original U.S. Vietnam War Named Special Forces ERDL Pattern Uniform Set - Blouse & Trousers Russian Awards Medals Badges Insignia with only minor differencesOriginal Items: Only One Set Available. The ERDL pattern, also known as the Leaf pattern, is a camouflage pattern developed by the United States Army at its Engineer Research & Development Laboratories (ERDL) in 1948. It was not used until the Vietnam War, when it was issued to elite reconnaissance and special operations units beginning early 1967. The pattern consists of four colors printed in an interlocking pattern. It was initially produced in a