Blades was an exclusive figure that was available in the United Kingdom and Europe around 1984 by the Palitoy toy company. He was available packaged with the Action Force SAS Hawk helicopter - a repaint of the F.A.N.G. helicopter.
A limited number of these figures were available domestically at the 1992 G.I.Joe convention, packaged as "Tripwire".
Note that there is a yellow "SAS" logo on his chest. This logo is extremely fragile and is easily scratched off.