Steven, thanks. If those are the bronze 2-pounder "Volante" guns with tube approx. 4' long total, then the cannon is too large or the soldiers are too small. The tube profile does look very much like the mid-1790's Spanish 2 pounder guns. Those shown in the engraving are large enough in comparison to the soldiers, to be the 4-pounder corto field guns, but there are no dolphins shown in the engraving, so they aren't the 4 corto.