Edward, They are all correct that is a Russ fork. Ernie Russ made more money from making and supplying these forks to other lightweight manufactures than he did from his own frames, Russ fork making was the mainstay of the business. Dale has posted a line drawing from an early 1930's Russ catalogue showing this fork pattern and registered design. Point of interest there have been lots of auction lots on ebay recently described as having Russ forks. I have also seen postings on the CR list stating the same but everyone I have viewed has not had proper Russ forks, technically as to conform to the registered design these should have round blades and the fork crown as per illustration. So D-Round and anything other than the illustration aren't proper Russ forks. Like everything the true definition gets lost and they just apply the Russ expression to the fork rake which is wrong. That extension on the track iron we call a "Middleton" or if it has indents for the bar clamp to engage in a "Duke". What is the name for a round section adjustable extension in the States? Happy New year and best wishes Mick B.
Thats all for now. Keep those wheels spinning, in your memories if not still on the road. Be lucky Mick Butler Huntingdon UK.