This elaborately laced and border tooled holster for a S&W 4” K frame seems to be a one of a kind - possibly made for the owner of the JK brand. The leather used for the holster body is continuously stamped “DRI-STEP CHROME” and “GENUINE LEATHER” as shown. I found a trademark
Oddly, it says "Dri-Step Crome", no "h". I wonder if there's any significance to that.
However, a person wouldn't normally tool or carve chrome tanned leather. The rather weak and shallow impressions on that holster may well be because it's chrome rather than the usual vegetable tanned.