June 18th, 1815. French canister shot from the Waterloo battlefield. ex: Waterloo Museum, Broadstairs, Kent, England, with certificate of authenticity. The Waterloo Museum was founded by Derek Spaulding who visited Waterloo numerous times and conducted archaeological exploration as well as collecting artifacts which had descended in the families of locals. Iron, just under 1 ¼”, 2.2 oz, twice the weight of a musket ball. From the Waterloo Museum. See https://ageofrevolution.org/200-object/canister-shot-from-waterloo/ for identical examples from Waterloo. Have two. Each.