What is “W”? Is it William?
I have it listed as Woolwich.
I’ve seen the mark assigned to Woolwich in a couple of collectors lists, but despite trawling through hundreds of pages of documents I’ve seen no evidence that Woolwich made chargers, although they acted as a depot for millions of “refurbished” chargers returned to the UK from France after their being repaired elsewhere by trade contractors.
If a comprehensive list of 0,303" charger manufacturers exists it’s so far eluded me … and it’s not for want of looking.
In a list from another collector it say "WM = Wm Mitchell Ltd.Smethwick (Pens)
Here’s the “Firms and Factories” list entry for William Mitchell.
From left to right it gives the company address, its war-work and then what it made pre-1914. There are over 16,000 separate entries and it took almost a week to sort through them looking for mention of charger making … there’s no index to the book.
Here’s a “WM” William Mitchell marked Mk II charger;
I ran your first picture through Photoshop … are you sure it’s not a faintly marked “WM” ?
It seems to have the same diagonally “chopped” II and signs of another marking after the “W”.
I completely missed WM in the title and instead just saw the W in the picture and the question “What is “W”?”. I need to pay more attention…