Dutch 120x570r tank gun semi-combustible aft cap casing

Dutch made 120x570r aft cap for the modern NATO 120mm Rh-120 / M256 tank gun used on MBT’s like the M1A1 Abrams and Leopard 2. 
 

This is just the bottom steel aft cap of the casing with the combustible section having… combusted. Primer is present with the very center having been drilled out. It is missing the rubber seal from the top half and has likely been polished although one “TP-T ink stamp is slightly visible. “EMZ” is the Dutch manufacturer Eurometaal Zaandam. Stamped “INERT” in several places. 
 

Buyer pays shipping, fairly heavy, happy to provide further photos.