Thanks for the extra info Dognose; our family was living in London at that time. I think that we can assume that his factory was in Birmingham where the goods were Hallmarked and then sold in his London Branch or agency. Mike.
Had a reply from the Assay Office... The ‘WL’ initials belonged to William Lewis first registered in 1897 as a Chain Maker/ Manufacturing Jeweller, had two addresses one being Roseberry Avenue, London, the other Northampton Street Birmingham. Thought I'd post it as it may be useful as a future refer...
Hi, I have just joined from UK and wonder if anyone could identify this Birmingham maker's mark? It is on a Double Albert watch chain from my late Grandfather discovered amongst some family pieces recently. The other marks are for Birmingham 1911. The picture shows the WL in separate joined circles ...