Thanks for the original tip and all the ones that followed. I was having trouble finding a holster for my 4506 no dash with square trigger guard. I found a fantastic NOS Don Hume holster on the 'Bay. However it was built for and marked S&W Md 645. The leather is very stiff and nicely finished. The fit is tight but not too tight. It is a "pancake" style and is perfect for my needs.