The 3028 is the replacement blade for the Bahco Clearing Axe 3022, the Swedish brush axe for clearing brush, saplings and trails.
It's Swedish steel, just over 1/16 in thick and 7 in long, with 5-1/2 in exposed for cutting and 6-1/2 in between the mounting pins. When the edge is worn out, swap the blade and keep the axe.
Bahco traces back to 1886, when Johan Petter Johansson founded a mechanical workshop in Enköping, Sweden. He invented the modern pipe wrench in 1888 and patented the adjustable wrench in 1891. The Bahco name comes from B.A. Hjorth & Co., the firm that sold his tools, and the brand is now part of Snap-on.