Take Diamond Cars?
The sign in front of the hotel suggested taking the “Diamond Cars.” Given that Tepper bought the land for his beer garden from Dimond, we doubted that this could be an early example of the “A” problem.
Dennis Evanosky explains
It was the Red Diamond line; the name had nothing to do with the district. It was the designation for the streetcar line that ran from downtown Oakland at 13th and Washington streets to Fruitvale and up to Hopkins (MacArthur). In the days before they numbered the cars, they used disks with different symbols. This particular streetcar sported a disk with a red diamond. I’ll bet the diamonds on that sign were red; people would know what they meant.
From the Joseph R. Knowland collection at the Oakland History Room, Oakland Public Library. Depicts Tepper’s Garden, a popular resort along Hopkins Street (now MacArthur Boulevard) in the Dimond neighborhood. Date: 1909. Enlarge photo