That looks good. I would make two alterations though for funcionality's sake. 1. Cut out the tip around the muzzle of the gun barrel. This will allow water and debris to fall out. If you look around, you'll find most holsters from the period are like that. 2. Make a cut-out in the holster around the trigger guard. This will allow for easier gripping with drawing the gun from the holster. As it is, you'd be stuck either gripping the bottom of the hand grip and readjusting before you can put your finger on the trigger, or trying to draw it using only your pinky and ring fingers, which is a weak grip at best.
Overall, a good look.