Both classification systems listed below relate to the Common Design stamps.
a) SJSC-W: The first part is the location identifier adopted by the King George Silver Jubilee Study Circle used for identifying the plate, row and column of the variety. The location identifier is followed by a number which was developed by Wallace in 1936 and listed each stamp alphabetically by country/colony and ascending face value. Below is the SJSC-W classification. The subsequent pages (Wallace A-F etc) provide the numbering system originally used by Wallace and
includes all 250 stamps in the Silver Jubilee series.
b) Gibbons: Stanley Gibbons has listed only selected identified flaws and variations.


SJSC-W Classification System

 The classification has four sections
   XXX-
X/X-
XXXX
(XX)
section no:
  1
2
3
4

Section 1:  This section identifies the name of the printer and type of variety
                       The first letter is the printer. B=Bradbury Wilkinson; R=De la Rue; W =Waterlow
                       The second letter indicates whether it is a Vignette (v) or Frame (f) variety and is followed by a dash
                       The subsequent numbers and letters indicate the Vignette number
Section 2: This identifies the Row (R) and Column (C) of the variety. They are separated by a "/"
                        If the row or column cannot be identified it is marked by "00"
Section 3: This is the stamp number according to Wallace. e.g.: Antigua 1d = J001; Virgin Islands 1d =J249
Section 4: This is the number of a new variation which cannot be correctly located and is enclosed in brackets.


Example using the SJSC-W Classification System:
Malta ½d with extra flagstaff  
SJSC-W: Bv1-9/1-J128


Gibbons and SJSC-W are shown below

Gibbons
Description
SJSC-W
Bradbury, Wilkinson & Company
A
Extra flagstaff to left of Winchester Tower
Bv1-9/1-XXX
B
Short extra flagstaff on Round Tower
Bv2-2/1-XXX
C
Lightning Conductor on turret of St. George's Chapel
Bv3-2/5-XXX
D
Flagstaff on Curfew Tower
Bv5-7/1-XXX
E
Double flagstaff on Round Tower
Bv6-5/2-XXX
De la Rue
F
Diagonal line at Brunswick Tower
Rv2A-10/2-XXX
G
Dot above and to left of King Henry III Tower
Rv2B-8/2-XXX
H
Dot to left of flagstaff on Round Tower
Rv4-8/4-XXX
I
Border dash to left of Brunswick Tower
Rv4/-3/6-XXX
Waterlow & Sons
J
Damaged turret on Brunswick Tower
Wv1-5/6-XXX
K
Horizontal log & flying kite
Wv2A-10/6-XXX
L
Vertical log and flying kite
Wv2B-10/6-XXX
M
Bird to left of Brunswick Tower
Wv7-1/5-XXX