I think James at Hell in a Handbasket posted something about this gun when he was still on his old site.

Someone has a NIB C O P 357X4 on GunsAmerica for $1,035.

An odd little gun, designed as a deep concealment for off-duty or undercover police officers.  Chambered for .357 magnum, with four barrels and a rotating firing pin.

Despite its compactness, its unloaded weight is 28 ounces--3 ounces heavier than an unloaded SP-101--but a good 1.5" shorter, too.

The company that made them is now defunct, so I guess they're collectible, hence the asking price.

Follow the link if you want to see a photo of it.  Another good page on it is here.