WWII model: Joe McCoy 901, The Real McCoy’s s613A, Buzz Rickson’s
Both McCoys use 14oz indigo denim (though I found that The RM is comparatively heavier) and BR uses 13.6oz. By the way, only The RM has the painted arch on back pockets.
In terms of aging and fading, took me ~1 year to develop nice patina on the RM and BR. Will see how it goes for the JM.