Company Names, addresses, dates¹:
  Gerhard Lang Park Brewery, 913 Md ave SW (1889-1895)
  Gerhard Lang Park Brewery, 359 M SW (1894-1896)

Notes:
Gerhard Lang brewed beer in Buffalo, NY. Apparently he had a Washington DC branch.


Bottles:

(enlarge)	This is a 9.5" light-aqua Baltimore Loop Blob top embossed: front: GERHARD LANG'S / (diamond trade mark) / BUFFALO LAGER / WASHINGTON, D.C. BRANCH
(enlarge)	This is a 9.5" aqua baltimore loop top embossed: round slugp late: GERHARD LANG'S / BOTTLING WORKS / WASHINGTON, D.C. back: THIS / BOTTLE / NOT TO BE / SOLD
(enlarge)	This is a 9.5" sun-colored-amethyst blob top embossed: oval pattern: GERHARD LANG'S / BOTTLING WORKS / WASHINGTON, D.C. back: THIS / BOTTLE / NOT TO BE / SOLD