This is a PS Products Holster known as the Boot 'N Belt, model HLM037BB.
This is the Boot N Belt ambidextrous concealment belt side holster. It is made of genuine high grade leather and it can clip on a belt or inside of a boot.
Features:
Fits Super Companion C&B, Companion C&B, .22 Short, .22 LR, .22 Magnum, Black Widow and Pug