What product was the first to be sold in a tin can with a key opener ?

I will risk to say Chinook Salmon ,1866?

The history of canning is generally traced to Nicolas Appert in 1795, who rose to Napoleon's challenge to invent a method to preserve food for military distribution. Donkin & Hall (UK) is credited with manufacturing the first tinned meats (& soups, vegetables) distributed to the British Navy in 1813.

"Retorting of tins was known in Britain in the 1830s...Tins were produced in a variety of sizes, ranging from the smallest (two pound) to enourmous ones weighing nearly seventeen pounds...Opening these tins presented quite a challenge. Most early tins were sold as military supplies, and until the 1840s the instructions on tins called form the use of a hammer and chisel. The earliest domestic openers were made in the 1860s and were called Bull's Head tin openers, as they had a cast-iron handle shaped into a bull's head and tails and were sold with tins of bully beef...In 1866 a special can with its own key opener was introduced."
---Pickled, Potted and Canned: How the Art and Science of Food Preserving Changed the World, Sue Shepard [Simon & Schuster:New York] 2001 (p. 245-6) - Food Timeline