Parachute harness quick release box (QRB), type B2A. Manufactured in the USA by Darling. The box functions but one pin does not retract when the disc is depressed. The pin can be forced to retract but does not stay down. This appears to be intentional as we have now had several that operate in exactly the same way. Some of the screws on the base are corroded otherwise very good. Stock code S22941.