Both of these 1.25” buttons are souvenirs of the “Brockton Fair” held in the shoe manufacturing Massachusetts city. The first has backpaper by Lopez of Boston while the second has no backpaper, quite possibly as issued. The button from 1907 shows the powered dirigible owned and flown by L. Roy Knabenshue. This was the third and final year that the dirigible appeared at the fair as the novelty of controlled flight became old news. Knabenshue had made his first dirigible flight at the St. Louis Expo and followed by an attempt at the 1905 Brockton Fair for which a souvenir button is shown in Collectible Pin-Back Buttons although that year he nearly lost his life when his engine choked and his ship snagged on an iron flagpole attached to a cattle barn. He did return in 1906 to make successful flights. By 1910, airplanes rather than dirigibles were the rage and the button for this year at the fair pictures an unidentified bi-wing primitive aircraft in flight. Hake Book Collectible Pin-back Buttons photo example Aviation Section #485 and #487. Comes with Hake’s COA. Both buttons are Exc. and display Mint. Each is the singular example we know of.