This Yorkshire Woollen Fleetline carries a sign inside the windscreen for Manchester but I suspect it may have worked a duplicate as far as Oldham. I don't really understand why it is parked in Mumps bus station as the X12 never called there. New as 29, the new number 688 can be seen to be a relatively recent change in this 1973 view.

From an original slide in the David Beilby collection, photographer unknown.