Originally Posted by
dinasrt
A quick check on Wikipedia tells me that in 2003, TI Automotive acquired Pierburg fuel pumps in Germany, and these particular pumps are being made in Poland now. So; if you have a pump that is stamped with "Pierburg" instead of TI Automotive, it means your pump is rather OLD. 
Hey Bob, THANKS for your research and for posting that information . . . That solves a few mysteries!