A 455 holster that's altered so it can be quickly detached from the belt

Picked up this holster today $90 at a gun show. It's been altered, probably by the company harness maker/saddler, by removing the original belt loop and adding another loop with a buckle and strap sewn to the one side and the other side sewn to the holster allowing the loop to flap open at the bottom so it could be added or removed from the belt easily or the loop opened up larger to fit a wider web belt. I believe that tab with the hook can go under the belt up and hook over the top of the belt or in a hole in the belt to help support the weight of the revolver. Ray

Attachment 45693Attachment 45694Attachment 45695