Confounded Contraption

I recently became the owner of a late 1960's vintage 25 acp. It is of a blow back design. The gun is now part of my collection as more of a curiosity than a functional firearm. However it is a firearm and as such it needs to be in good repair and functional. My problem is that I can't figure out how to field strip the weapon for cleaning. There are no take down levers, slide release or stop, and no visible method to remove the slide to access the barrel for cleaning. I've spent some time researching the company to get a manual but they are out of business. I'd like to clean it up and shoot it, as well as replace the springs. Any help would be greatly appreciated.