407 - Bonnet fastener, twist to release - as Ripaults S.A.4

Chrome finish on brass, tee shape twist handle fastener. Push top down against spring to engage hook, turn through 90 degree to release. Lever top 52mm long, angled base approx 45mm diameter with four fixing holes. Height fitted 95mm. mounting hole centres approx 28mm horizontal, 22mm vertical. Similar to Ripaults Model S.A.4