Pontiac trivia question: what event took place in Washington, D.C. on June 13, 1935 ?

I have what appears to be a ceremonial staff or flagpole with a brass plate enscribed :PRESENTED BY PONTIAC MOTOR COMPANY AT WASHINGTON, D.C. JUNE 13, 1935. The pole is approx 54 inches long with a brass ferrule one end near the enscribed plate, and the opposite end of the pole is tapered to fit into something. What event took place on this date ? Was Pontiac celebrating some milestone in the company history, or awarding a new Pontiac car to the lucky winner of some contest ? it sounds like it was a great photo opportunity. any ideas ?