Was basically trying to make a headshot for his future reference, turns out Heinkel here decided he didn't want to look old enough, so I just went on with it and made his younger self instead.

Early 20's more or less, around this time his father was injured at the front and ended up in a wheelchair, so for a while Heinkel had to work for both of them just to earn enough to keep going on. Luckily Oskar managed to get him in the same factory he was working at the time, but that meant he had to work late-night or extremely early morning shifts there and still work wherever he could during the rest of the day.

Despite the working hours and exhaustion he used to be a rather content honest man before he became the walking embodiment of passive-aggressiveness.