[Norcal94552]

BP - G-19 - July 1988 - - GTT bdc, Austrian markings on slide and barrel. Original tupperware box labeled Glock 17, Best in 1987.
What does GTT bdc mean?

 

[trozau]

BP - G-19 - July 1988 - - GTT bdc, Austrian markings on slide and barrel. Original tupperware box labeled Glock 17, Best in 1987.
What does GTT bdc mean?

bdc - barrel date code. It represents date when the barrel/gun was test fired in Austria.
GTT - First letter is month (G is July), next 2 letters is year (T is 8). GTT translates to July 1988.