https://patents.google.com/patent/GB702140A/en
GB702140A - Improvements in or relating to shuttering for the construction of concrete columns,...
702,140. Shuttering for casting columns and beams. HAWES, A. H. Aug. 21, 1951 [Aug. 21, 1950], No. 20679/50. Class 20 (2) Shuttering for a column comprises...