BSA Mercury & Airsporter Sear
This spare fits the following models:
Airsporter Mk 3
Airsporter Mk 6
Airsporter Mk 7
Airsporter Centenary
Airsporter RB2
Airsporter Stutzen
Airsporter S Carbine
Airsporter S Mk 3
Mercury Mk 2
Mercury Mk 3
Mercury Mk 4
Mercury S
Mercury Challenger
Mercury 365 Magnum