The Whitney Wolverine is a semi-automatic .22 LR caliber pistol created in 1956. Notable for its advanced, “space-aged” looks and then-new aluminum construction, it has a 10-round magazine, a barrel 4.625 inches (117.5 mm) long and a weight of only 23 ounces (650 g).

https://en.wikipedia.org/wiki/Whitney_Wolverine