I´ve seen examples of them in print but I can´t remember where. They look  late medieval  or Renaissance.

The pics  come from „das Zeugbuch des Kaisers Maximilian I. 1475“
Digital Version HERE
Look under the titel (left Hand side )  Messinghakenbüchsen
The book shows a whole range of arquebus´s, big,  small, on Trestles, two legged stands, wheels, breech and muzzle loaded. 
Looking at the pics…the „Flaming Brands“ depicted on the RedBox Bods now makes sense.

Arquebus from The German Hakenbuchse..a Hand gun with a hook so it can be braced when being fired. 

It could be RedBox were being too literal by portraying a hammer with two spiked heads but, even though they aren´t as common These days, so called  „Stone Dressing Hammers“ used to be common and they do (did) look a wee bit like small pick axes.