Additions to Registration marks 1919-1927


Meeting of 13.7.22 (Official Bulletin 2)

Country Prefix Notes
SwitzerlandC-H
NetherlandsH-N
SpainM-

Meeting of 25.10.22 (Official Bulletin 3)

Country Prefix Notes
Latvia (Lettonia)B-L
LuxembourgL-U

Meeting of 28.2.23 (Official Bulletin 4)

Country Prefix Notes
HungaryH-H
MonacoM-M
DenmarkT-D

The schedule produced after this meeting also amended a number of marks.

These subsequently reverted to their former marks after the next meeting.

It is not clear whether these were simply typographical errors. The changes were:

Country Prefix Notes
UruguayFrom C-U to C-M
EcuadorFrom E-E to E-U
HaitiFrom H-H to H-E

Meeting of 26.6.23 (Official Bulletin 5)

Country Prefix Notes
AlbaniaB-A
BulgariaB-B
Costa RicaK-C
SwedenS-A

At this meeting Monaco (M-M) changed to M-O and Hungary was amended to H-M.

Uruguay, Ecuador and Haiti reverted to C-U, E-E and H-H respectively


Meeting of 3.3.24 (Official Bulletin 6)

Country Prefix Notes
EstoniaE-A
FinlandK-S
LithuaniaZ-L

Meeting of 14.10.24 (Official Bulletin 7)

Country Prefix Notes
ArgentinaR-A

Meeting of 6.4.25 (Official Bulletin 8)

Country Prefix Notes
ChileB-C

Meeting of 6.10.25 (Official Bulletin 9)

Country Prefix Notes
AbyssiniaA-B
PersiaP-I
Free City of DanzigY-M

Meeting of 3.11.26 (Official Bulletin 11)

Country Prefix Notes
SalvadorY-S

Meeting of 25.4.27 (Official Bulletin 12)

Country Prefix Notes
AfghanistanY-A
DominicaZ-D

Using a group of 4 letters out of the 26 of the alphabet

Each group containing at least one vowel eg: ADCJ PURN. The letter 'Y' is considered to be a vowel