Good question! I am curious, too. Actually, the reference to an "A" shirt seemed more sophisticated that many work places!
Originally Posted by mmack66
Re popularity of the A undershirt, I found this on one website: "
it [has] spread through out the world as the most popular undershirt for most men." This was a reference to recent years, not some time in the past.
I on line searched photos of Brando in "Street Car Named Desire" to see what he wore. Interestingly, he wore both T and A shirts in the course of the film, wearing an A shirt, for instance, when he was "attacking" Blanche. He wore each in white and what looks like gray to me, although one "colorized" version had an A shirt in orange of all colors. Maybe one in blue, too. Must of the tees were standard round necks but there may have been at least one with a V neck. Overall though, it appears that is SND is accurate, at least in the late 40s early 50s T shirts rather than A shirts were the most popular undershirts among the New Orleans working class.
I wonder if there any problems with continuity in film a to Brando's shirt. I did not see any references to any on-line and there were references to some very slight things.