Also might have been from construction or dock work if he ever did that too.
My understanding it that you need to be there by 'shape up' to get work for the day.
Then if you were a day working, you'ld get a token.
This is work badge - its a little different. I think it went to more permanent or regular employees. It was pinned on to show you work there and was not turned in for pay at the end of the day.