Following on, from the previous post.
If there is anybody out there, actually interested in this stuff!
Some interesting aspects to the Serial Numbers appear,
once they have been sorted.
For information, I don't intend at this stage to go futher than 1969.
1936 Serial Numbers start sequenctialy
with the Format 7,X(x),Y - Z
In
October 1947, the "A" appears in the middle of the Serial Number.
In
November 1947, the Format changes to the more familiar ZZZZZ-X(x)YY and Number is reset, possibly even to 1. (We have No 39-A-1147 on record).
This I believe co-incides with the change away from the HorseShoe Movement,
but I haven't received any feedback at all yet to confirm this.
In
October 1961, an additional Serial Number Range is added.
Numbers start low and a Suffix
F is added.
Both Ranges are run in parallel until at least 1963 when the F range appears to have been dropped.
In
1964 a new Range is introduced, with numbering reset and Suffix F is removed.
Run in parellel with the Range introduced in 1947.
In
1967, a suffix M seems to have been added to 1964 Range of numbers.
In
1970 Serial Number Format and location changes to Sticky Label.
I have no idea yet, what the Suffix F and M's mean.
The Number Range which started in 1947 with the new Format, ran uninterupted
right up until the change to Sticky Labels in 1970.
Ian