These are WRENN OO/HO X171 Coupling Hooks, pressed steel. They are different to the regular 'Hornby' hooks as the rivet/eyelet connecting end of the arm has a FULL circle of steel to prevent the hook jumping off the connection.
Wrenn Lyme Regis Body and Wrenn Hornby Dublo nameplates and backing plates
Wrenn Eddystone Body and Wrenn Hornby Dublo nameplates and backing plates
