Here's a P1000 GEN1 (left) next to a P1000 GEN2 (right).

GEN1 pipettes:

  • Don't have any marking that says "GEN."
  • Are shorter.
  • Have the bottom of their body shaped like a trapezoid.

GEN2 pipettes:

  • Are always marked "GEN2."
  • Are longer.
  • Have a square bottom.
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