Company Names, addresses, dates1:
Canada Dry Ginger Ale Inc, 916 RI ave NE (1943)
Canada Dry Ginger Ale Inc, 1201 East-West Hwy, Silver Spring MD (1958-1980+)
Canada Dry shows up in Washington DC directories in 1943, but I've never seen a Canada Dry bottle that said "Washington DC" on it.
1 Boyd's Directory for the District of Columbia (various years)