I cann't give you much info but my 1961 Stoeger 1961 Shooters Bible List the following.
Mississipi Derringer in .22 Long rifle or .22 magnum caliber.
Fires .22 short,long or long rifle without adjustment.
Light,compact,easy to conceal, the Mississipi Derrenger is an ideal weapon for home defense, when traveling, or just plain plinking. Particulaly suited as a ladies purse gun. May be worn comfortable in any form of holster or carried in the pocket. Facilitates rapid draw. Available in rich blue-black finsih or durable hard chrome.
Specifications: Type double Barrels, over and under, WITH ALTERNATING FIREING PIN, dual ejection on single stroke. Caliber: .22, for short long, or long rifle cartridges either high speed or standard velocity. Barrel length-3 inches: Overall length 4 3/4 inches. weight 13 ounces. Sights-"V" notch rear and blade front. Grips checkered composition.
Priee $19.95 in Blue Finish $24.95 in Chrome finish with Pearl grips.
This is from the catalog page of the Stoeger Shooters Bible No. 52 1961 GIANT EDITION.
Just happens to be the one I had handy. I know my dad has quite a few of these. I just don't have room for them.
Cheers,
ts