Here’s an assembly of hook anchor points with micarta ‘fish plate’, hook arm with damper attachment, spring damper. All this stuff does not have dH serial numbers, nor is there an Illustrated Parts Manual. Laying upside  down under the Sea Hurricane at Shuttleworth, to disproving frowns, and crawling through the Sea Hornet rear fuselage remains at the always welcoming dH Museum, crawling through shipping containers at always welcoming Avspecs allowed a forensic reconstruction of bits and pieces collected from many locations. The remains of an internal fuselage strake are shown under the fuselage of DZ542 in NZ. The stainless steel hook retention mechanism did have dH serial numbers, which indicates forward planning for the postwar Sea Mosquito design.