German first world war fuze?

[AndyD]

Hello,
I picked up a solid brass German fuze yesterday,but I'm unsure if it's first world war period or not.

So far I've managed to establish that it's a timing and percussion fuze,made by Spandau.

The thing that puzzles me is that one of the markings on the fuze isn't listed in my reference book.
The full markings are, Dopp Z. c/92,with Sp. for Spandau underneath.
The time intervals run from 1-28 seconds.

I'll attach some pics so you can see what I'm babbling on about!
All help gratefully accepted!

Kind regards,
Andy

[AndyD]

2.

[AndyD]

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[AndyD]

Last one!

[Zünder]

Yes, you're right, it's WW1.

Mostly used on 9, 10, 12, 15 and 21 cm shells.

[AndyD]

Thanks for that Zunder!!

Would you happen to know what the c/92 means please?

Kind regards,
Andy

[Zünder]

I have no idea, WW1 ammo is not really my "cup of tea".

92, year of design ?