Congrats! You go top of the class, though not without a little help from Trevor. The pistols were made by Cabanas SA Industries, Anguila, Mexico. http://imgur.com/a/TjNTm
This company was better known for weird .177 and .22 pellet pistols that fired blank cartridges, which were apparently surprisingly powerful and would have been quite illegal in most countries these days. They did produce air rifles (see http://www.pyramydair.com/blog/2012/...door-neighbor/), but there is surprisingly little documentation of their air pistols. Also it seems that the company went bust in 1999, so these pistols would have to date pre-millenium.
The wood grip version, which does have an uncanny resemblance to the Milbro Cougar, came in a nice wooden case. http://imgur.com/a/vscRS. The later all-plastic grip pistol has the model number RC 55S.