black powder signal cannon View cart “Rockingham glaze pottery” 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 Turn of the century fire helmet $995.00 Add to cart Hand carved and colored bust of a man smoking a pipe $350.00 Add to cart Period mirror with reverse ships painting $225.00 Add to cart Tiffany & Co $10,500.00 Add to cart