The guy at the end is drinking. I though it was just water. Times have changed. My dad worked on Bart during the 70. He said, drinking was commonplace, at least amomg electricians.

The first man from the right has been identified as Slovak worker Gustáv (Gusti) Popovič from the village of Vyšný Slavkov in the Levoča District of Slovakia. Popovič was originally a lumberjack and carpenter. In 1932 he sent his wife Mária (Mariška) a postcard with this photograph on which he wrote, "Don't you worry, my dear Mariška, as you can see I'm still with bottle. Your Gusti."