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MK 339
The MK 339 are a series of US Navy (USN) developed mechanical time (MT) fuzes, of which two are known: the MK 339 MOD 0 and the MK 339 MOD 1. The MK 339 series were developed as a universal fuze for canister- or cluster-type munitions. They are now used on the MK 20, CBU-99 and CBU-100 series of munitions. The MK 339 MOD 0 and the MK 339 MOD 1 primarily differ in the time period they can be set for, though there are other minor differences...
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