Shell casings with a catch..

[Bonzododa71]

I found these over 30 years ago in London UK, and I am wondering if anyone can tell me are the head stamp dates for real..also one has been fired the other had been disassembled inside the casing was a piece of newspaper that seams to relate to building a tennis court, it has survived very well.............HH....Bonz

 

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[RTR]

Maybe a Dummy round ? https://forum.cartridgecollectors.org/t/early-dm-7-92x57-dummy/14725

 

[ToddsPoint]

The ones marked K were made by Deutsche Metallpatronenfabrik in Karlsruhe Germany in 1898. Likely 7 or 8mm. Gary

 

[Bonzododa71]

Now that's strange, 16 years before the outbreak of WW1, those rounds would have been 16 years old at that time and found in England....HH...Bonz

 

[pistol-pete]

Perfectly normal to use up the oldest Ammo first. Being German they could be 7.92x57mm German Mauser. Incorrectly called 8mm Mauser.