Join Date: Dec 2004
Location: Route 66
The three hollows were, if I understand, the triangular or three faced blades , if I recall, they were termed 'Biscayan' as noted by Ibrahiim
The colichemarde blades I believe were primarily produced in Solingen, but I would not be surprised at French production as well. I agree, it is unlikely any were ever produced in Shotley, but most certainly were imported in some degree.
All the best