Company Names, addresses, dates:
  King Cola, Washington DC

Notes:
King Cola does not show up in any Washington DC City Directories.
King Cola was a product of the Virginia Beverage Corporation, which bottled King-Cola in several cities¹.


Bottles:

(enlarge)

This is a 7.7" aqua crown top bottle embossed: front: KING-COLA / THE / ROYAL DRINK / RICHMOND, VA. / WASHINGTON, D.C. back: REGISTERED / 6 1/2 OZ. CAPACITY bottom: AGW / 10-2