From Lee Valley's description of their butt chisels:Today I learned that butt chisels can be very useful when installing butt hinges.
Over the years of buying groups of chisels a lot of them had been well used by previous owners and became fairly short.Butt chisels got their name from their popularity in installing butt hinges.
They have a place of their own in the back of a drawer with my most used chisels:
Buck Bros & Butt Chisels.jpg
There might actually be two from the same maker, though one is marked Witherby and the other is a Karpenter brand (both made by Winstead Edge Tool Company).
jtk