6906 Trigger Guard Variations

[Bedfordtec]

I have both a 6904 and 6906 with the square trigger guard (like a Glock or Beretta) with finger serations. There appears to be three versions of 6904/06 with different triggerr guards. The first is the round one and the second has a slightly squared trigger guard with finger serations. The third is the pronounced supporting hand finger grip. Have researched the 6904/06 and cannot find out the production sequence and if there are any other differences among the three models. Please let me know if you know the sequence. The gun is great. Thanks

 

[stansdds]

I don't have the exact dates for the changes, but the sequence of trigger guards for the 59xx and 69xx pistols was as follows.
Long, hooked guard
Long, rounded guard
Short, rounded guard