Found this in the Italian "Luce" cinematographic archive
https://patrimonio.archivioluce.com/...ml?startPage=0

1933 Luce Movie chang kai ckek Hawk 1.jpg1933 Luce Movie chang kai ckek Hawk 2.jpg1933 Luce Movie chang kai ckek Hawk 3.jpg

Someone can identify these bombs being loaded under the wing of a Curtiss Hawk II? Local Chinese production? or something else?