Germany - Breweries

The Dortmunder Union Brewery in Dortmund, Germany, was established in 1873. By 1994 the Dortmund Union brewery had shut down, and merged with several other Dortmund breweries to form Brinkhoff's Brewery which still brews under the Dortmunder name.
Some of the Brewery's Range
Dortmunder Union Export -
Dortmunder Union Pils -

Over the years the brand identity is updated and re-launched with subtle changes, a change of Logo or a new font.
Sometimes this brand update is done by the new owners after a brewery has been sold, other times just to give the brand a fresh new look on the ever growing market.

Below are some notes to help identify some of these changes and an aid to reference the year of the glass.