3.7cm Flak 43 8-round loading tray

I have got this huge loading tray for the 3.7cm Flak gun. It measures 445cm x 210cm and is heavy. Herb Woodend likened it to a drain cover and advised me to get rid of it. Anyway, 11 years later I still have it.

It is in much better condition than the photos show, the rust is very fine and light. The only markings that I have round are: wa 4 in the centre and 11 in one corner. Can anyone help with further information, particularly details of the cartridge that it would have held? An image of the cartridge would be wonderful.


Gravelbelly, these chargers held the regular 3,7cm Flak rounds 37x264B.