Looks pretty close to the older set that I have, but mine don't take the standard key. A regular cuff-key will not open them. I was sent some special keys from S&W that would.

I'll get around to some pictures sooner or later. My keys have an elongated handle....like a boat-paddle may be the best way I could describe it. These others my son has take the key that looks like an old jail-house, or old house door key.