For fast-burning, short-range 4.5” barrage rocket. 4.2” long. Steel and brass, with Bakelite propeller. Since the fast-burning, short-range 4.5” barrage rocket was not standardized, this fuze was not standardized for production. 1,200 were manufactured by Caltech and delvered to Army Ordnance in June, 1944, for tests in a demolition rocket.
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