Actually for a while they sold Gilbert trains and toys. My dad bought one of my 1956 Christmas gifts there, a Gilbert HO train set.
When Frank & Seder went out of business floors 4 through 7 were rented by an engineering firm that I joined on graduation from college. The building was known then as 441 Smithfield street.
Sorry for the deviation from trolley’s, but I did ride the street car to work from the Castle Shannon municipal building stop.