@Besoeker …yes, that is a moulded-on plugtop, whereas the one in the wolf drill photo is a freeranger type, so could have been aftermarket added at any time.
"Vanished Tool Makers: Wolf Electric Tools, London, England
The eponymous Wolf Tools was founded by S. Wolf in 1900, opening their Pioneer Works in Hangar Lane in 1935. "
Good grief Mac…yes you’ve jogged my memory. The old Boley Machine Tools works I used to boff a young lady who’s dad was a tool maker in Hangar Lane Ealing. He rode a goldie the same as mine … a 500 single and boy could she go … goldie was fast too LOL!!