I'm a little confused, which isn't that unusual, but most often I can sort it out before embarrassing myself in public...which I am probably about to do.

Based upon expert testimony, there were only 1067 of the .22-40s built, and most of the examples here fall into the 684xxx range, and yet bdGreen shows a pair serialed at 691386 and 691387. Did I miss something? Is there a reason for the break in the numbering?