Information about big caliber shell

[Deges]

Hi,

Can anyone tell me more about this big German shell from 1943? What do the letters on the bottom say? It's about 72 cm high and 18,5 cm in diameter. Any info is welcome!

Thank you.

Grts

[Teck 147]

From a German 17cm Kanone 18

KMrsl: Kanone Mörserlafette

[Deges]

Thank you for this information!

Grts Nick