Time fuze mčz S/30, Czechoslovakia

[microplastic]

Cutaway model of the Czech-made time fuze Emčz S/30. The fuze is a simplified or further developed model of the original German time fuze s/30. The fuze is used for 100mm frag grenades.

Firing: On acceleration, the two locking plungers are pushed into the holes in the base housing. This releases the hand that was held by one of the plungers. The clockwork begins to run, and the rotating hand is pressed up against the hand race insert by the spring in the center of the hand. When the hand reaches the cut-out part in the insert, it is forced upwards and releases the brass centrifugal safety catch. The safety catch is then swung outward by centrifugal force and pushes the striker into the primer.

If the hand is accidentally released too early before firing, for example due to a mechanical defect, the brass centrifugal safety swings backwards under the force of the spring. The locking pin locks the safety catch via a hole in the housing, and the firing pin is secured.

There are several versions of this Czech-made fuze, for example, with an original German clockwork (pic4) or as a time fuze with an additional safety element (pic5)...

 

[AKON_]

Hi microplastic
It might be interesting for others to include the marks: manufacturer and year of manufacture, possibly other marks on the fuse body or on the watch movement.
Akon

 

[Nabob]

Excellent cut!
Great to see the the striker function.
This clockwork was used in fuzes mčz S30 from lot 9/54 and all mčz S30rp (the colored diagram in microplastics post).
The marking usually looks like this

 

[sgdbdr]

So what's the difference between Emčz S/30 and mčz S/30 ?

 

[microplastic]

Hello,

fuze with german clockwork : mčz S30 fut 14-52 / base and ballistic cap aluminum, clockwork brass
fuze with Czech clockwork: Emčz S30 fut (date unknown) / base steel, ballisitc cap and clockwork aluminum

Regards

​

 

[ron3350]

Hello,

fuze with german clockwork : mčz S30 fut 14-52 / base and ballistic cap aluminum, clockwork brass
fuze with Czech clockwork: Emčz S30 fut (date unknown) / base steel, ballisitc cap and clockwork aluminum

Regards

​

My fuze is the same as your first photo, dates etc so is a German clockwork model.

I show the view, base, top of clockwork and inside nose cap.
Note the clear plastic over the base holes. I guess it is to waterproof the fuze?