William McFly driving the Haysville Mercantile Deliveries truck.
Haysville Mercantile Deliveries was a business which was established in Haysville in 1905 in the alternate timeline where Edna Strickland accidentally burned down Hill Valley in 1876.
William McFly worked for Haysville Mercantile Deliveries in the 1931B timeline, and drove a truck that bore the company name.
In the restored 1931 timeline, the business was nonexistent as the company was established in Hill Valley. In its place was Hill Valley Mercantile Deliveries.