Czech Republic - Breweries

U Fleků is a pub and microbrewery in Prague, Czech Republic. Originally a family business, the pub was founded in 1499 and often referred to as the oldest brewery in Prague.
Some of the Brewery's Range
Flekovský le žák 13º -
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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.