The Serial Number Database is the fusion of several key initiatives:
1) Tracking of highs and lows for each prefix
2) Tracking changeovers
3) Tracking replacement note ranges
4) Collecting data for research purposes
"Duty" is a rather strong word... It makes it sound like a job or a requirement. All notes entered to the SNDB are entered voluntarily by members of this site. Your contributions help all of the above four initiatives. Every note counts, and every one is appreciated.
We encourage all members to enter all of their notes
(exceptions are for notes in sequential runs; see (1), (2) and (3)). Even if your note is not near a high, low, replacement range or changeover, it helps fill in those "in between" areas. This is important because if something comes up later, such as a new variety, etc., that data will help us figure out what's going on.
I hope this reply has been helpful.
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BWJM, F.O.N.A.
Life Member of CPMS, RCNA, ONA, ANA, IBNS, WCS.
President, IBNS Ontario Chapter.
Treasurer, Waterloo Coin Society.
Show Chair, Cambridge Coin Show.
Fellow of the Ontario Numismatic Association.