I typed this before I saw Pedrocut's post
When I first ever saw the pic my first thoughts were that it was Holford Drive which went from Holford Mills to the Aldridge Rd as shown in the map below. Looking at another aerial view I can see two chimneys at the rear of those works away from the shell packing compounds. However we can't be certain because I would assume that most of the people in pic would walk towards Witton rather than towards the Aldridge Rd which probably seemed out in the countryside in 1912.
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