A bit of "minor league" trivia: Back when revolvers were the thing to carry, I re-sewed the belt loops on my holsters to a similar angle. It was not only more comfortable, but it helped to keep the butt from digging into the car seat and slowing the draw while seated. I continued the practice after switching to the 669 in 1989 (and the 6906 and 3913 later.) We also used to increase the angle on crossdraws. It was common to see a cop with a 6" revolver that could be drawn nearly horizontally, also an advantage when seated. I can see these theories in Phil's holster. A very nice find!