Anyone know what this practice bomb is?

[Gil Boyd]

Steve,
There are several at the IWM Duxford which opens back up today. If I can get a photo for you, they are identical mate if it helps so worth $60 of my money if that sort of thing is what you want.
Flour came in during practice runs later, used by airforces both sides of the pond in WW1.
The IWM ones I refer too, the picture isn't on the page. This is another version on the same theme. They came in every shape and size:

RARE Circa 1918 WW1 U s Army Practice Bomb Wood Solid Training Dummy Bomb | eBay | Ww1, Ww1 posters, Ebay