Wigan Album

Ron , stunning print of what I assume to be an architectural impression of what the building would look like.
The other one you posted shows from the front of the building an extension to each side.
Whether these were incorporated at the same time as the original build or at a future time would be interesting to know.

Colin, this isn't the centre of Coops it is the right hand side as you look at it now. This is confirmed by the bay windows either side of the entrance.
Coops was extended to the left (what is now the centre) and then extended again to the left.