- MIL-P-63331 NOTICE L Ob 2060237 4bT NOTICE OF INACTIVATION FOR NEW DESIGN 1 INCHPOUND I MIL-P-6333 1 (AR) NOTICE 1 19 August 1997 MILITARY SPECIFICATION PERISCOPE, TANK, M44AlEl distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-