I have a Fox Umbrella and it may be older than i first thought.
I have googled what i can, and it may be London 1927 but i don't fully understand the hallmarks.
Is the smudged large one at the bottom representative of the Maker ?
If your umbrella frame is marked 'Fox', then the name likely refers to the frame maker, S. Fox Ltd. Their frames, which were extremely popular, were used by many different umbrella manufacturers.