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Hi Joe,
the mz 35 series of fuzes used the CSM impact mechanism.
It was originally thought that this mechanism would be with minor adjustments used in many fuzes.
nz 10 for HE projectiles, mz 30 for 120 and 160mm mortars, mz 35 for 82 mm mortars, nz 40 for HEAT, mz 50 for smoke mortars and later nz 16 for training HE SD rounds.
The mechanism had many issues so and inertia function was not really necessary for mortars. A substitute solution had to be found quickly. Soviet M-5 fuze was briefly produces by the Koh-i-noor company (You know that one ).
A simpler mechanism was designed for the mz 31 and mz 36 fuzes. It was designed in such a way that existing mz30 and mz35 fuzes could be retrofitted with it. So the mz 30/31 and 35/36 were created. fuzes of mz35, mz35a and mz35b were retrofitted in Nový Bor factory (avm code) in 1954 and 1955.
In 1984 and 1985 old 82 mm EOF HE mortars were reworked. Several fuze types were used including 3 lots with mz35/36 fuzes.
As late as 2000 the fuzes were used in 60 mm PR-S training mortar rounds. They were old refurbished ones.
The P is a sign for reworked fuzes. It is found on other fuzes too.
For example ex German klAZ 23/1 or reworked lots of czech manufactured fuzes (this time usualy above the fuze name)
Bob
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