black powder signal cannon View cart “Brass ship’s porthole” has been added to your cart. View cart “Brass ship’s porthole” has been added to your cart.$995.00Early 20th century black powder signal cannon. 14” long and 8” high black powder signal cannon quantity Add to cart Add to Wishlist Categories: Accessories, AmericanaRelated products Brass cigar cutter $650.00 Add to cart Tiffany favrile glass signed bowl $2,900.00 Add to cart Advertising carved wood shoe $2,100.00 Add to cart signed Japanese green glass float 1 $495.00 Add to cart