This brand and style of holster was the only one authorized for NYPD duty weapons (pistols) for its officers from about 1994 until being replaced department-wide by 2017.

It bears an NYPD logo stamp that confirms it was used by an NYPD officer and the signs of usage by the world's best known police department make this a collectible worth having.

This holster was used for a Glock 19, left handed, 9mm firearm. 

It's a level 2 retention, outside the waistband, slides onto a belt (up to about 2 and 1/4 inches), and is a Left Handed holster.    

Only what you see in the photos is included. No user manual, no original packaging, no allen/hex key for the belt retention screws.