In my experience, I have found insert notes only between the 000 and 001 notes, and between 500 and 501 notes. All inserts have been consecutively numbered. Where I found some between the first set of notes, I found an equal number of inserts, numbered exactly 500 from the first ones, between the second pair of notes.
Eg: Just this week, I went through a brick of 1,000 HNT $5s. There was a single HNR insert (HNR 9146412) between 000 and 001, and there was a second HNR insert (HNR 9146912), between 500 and 501. [NB: I've got the radar from the HNTs, but I don't have the number at the moment. If I remember later, I'll post it when I get home.]
« Last Edit: November 25, 2004, 01:37:23 pm by BWJM »

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BWJM
Member of CPMS, RCNA, ONA, ANA, IBNS, WCS.
Treasurer, Waterloo Coin Society.
Show Chair, Cambridge Coin Show.
Fellow of the Ontario Numismatic Association.