The fork legs and other features look like balistic forks which in turn were copies of american forks like manitous and tange.
Balistic are a Taiwanese firm that made early cheapo forks but at the same time better quality than some of the rubbish of today. Your forks however may be something even better
The brace is the same welded steel as the RS-1 (with the canti bit cut off), the dropout is the same as is the leg profile and even the stickers at the top of the legs warning not to fit crown above this line. It looks to be missing all the plastic cover bits on the legs that RS-1s came with and it appears to have the later upgraded oil wiper seal things.
The crown isn't a Bonty/RS one though - although most bolt together forks could be interchanged at this point, and the air valves are wrong (car valve rather than needle) and although this could be a home made bodge it also was the thing that RST and Ballistic used in thier air forks, although that was much later on :?