I am a bit confused about the different types of cajones. I hear the "Peruvian" described as being basically a simple box, and the "Flamenco" described as having the "snare" mechanism inside. Está bien.
Entonces, I find this site, which calls the Meinl CAJ3 (mine) a "Peruvian cajón with a built-in sizzle effect." I thought that if it had the "sizzle effect" it was by definition a flamenco cajón. Here, for example, is a cajón that pretty much confirms that impression. It has a "peruvian" side and a "flamenco" side on only the latter has a string/snare. That is a beautiful instrument, by the way. The guy who makes them and sells them on ebay, cesar233, certainly looks like he knows what he's doing.