Probus (click on photograph to bring up bigger/better version).
[Thanks to John Hurst for all the photos.]
Markings: "CHARLES WINN & CO BIRMM", and a diamond-shaped Patent Office mark.
Manufacturer: Charles Winn of Birmingham.
Markings: Flag and "MADE IN ENGLAND".
Manufacturer: Lee Howl.
Manufacturer: The Metal Agencies Company Ltd of Bristol.