I'm not sure if I understood your problem.
The serial numbers in first series T/Z notes follow the generic scheme Z
NPP
NN*, where:
- Z is the first letter, of course;
- PP is a number (from 00 to 80) that may be derived from, or corresponds to, the plate cell;
- N__NN are the first three digits of the relevant serial number.
For
T/Z, for example, the ranges for each plate are:
T001
Z4**00 - Z4**09
Z4**24 - Z4**25
Z5**00 - Z5**04
T002
Z4**09 - Z4**26
There is some overlapping between the two plates (Z4**09, Z4**24 and Z4**25) for a simple reason: the ranges seem to be continuous. For example, T001 printed notes up to Z4PP25135* and T002 from Z4PP25136*. In the Huge Table notation, they all come as Z4**25.
You have probably already checked the tables by giulcenc @
http://giulcenc.altervista.org/ebt/1Z.pdf. Although they do not detail the subranges stated above for the twentiers (nor for the
and
, also split between several plates), they are the main reference for this.
(Note: I have just analyzed nearly 8000 unique serial numbers of T/Z from ET and my own. Apart from some 50 identifiable registering errors, there are only a dozen outliers, which arguably may also be errors, but there's a chance that some of them are replacement printings.)
PS: I just noticed that your own example on your new Huge Table (
http://ebtcheck.marty44.net/ebtcheck/st ... able.php#T) has most likely a mistake. The figures shown for T/Z don't make sense. My guess is that they're taken from the wrong positions in the serial numbers. They're correct on the Große Tabelle in your own EBTST stats (
https://dserrano5.es/ebt/ebtst/stats/ma ... ble.html#T).
