Tek. Nr. M21; Shock Cord Fixing (2 exemplaren). Tailorcraft, Britannia Works, Thurmaston, Leicester Tek. nr. D.217099; Fixed gunsight G.C.S. mk.4 introduced in lieu of retractable type mk.6. Hawker Aircraft Limited, Kingston-on-Thames TD-1183 Kopie van tekening A15747: plumbline fixed point to fuselage; p/o B15745; WUC 11B99
