They were called Diadrant forks. http://www.classiclightweights.co.uk/builders/bates3.html
@yoav started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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They were called Diadrant forks.
http://www.classiclightweights.co.uk/builders/bates3.html