This is a PS Products Holster known as the Belt Slide, model 036B.
Genuine high grade leather. Fits up to 1 3/4 belt" with removable clip for wearing inside or outside the waistband and is ambidextrous.
Features:
Fits small to medium frame handguns such as .22, .25, .32, and .380 handguns, plus some smaller 9mm models
Ambidextrous