Without the definative list of S-W codes, how can we work out what gauge came from what vehicle. By the date code, of course! The Gauge I pictured is dated K6, which is June '42.
Year of manufacture:
A - 1933
B - 1934
C - 1935
D - 1936
E - 1937
F - 1938
G - 1939
H - 1940
J - 1941
K - 1942
L - 1943
M - 1944
N - 1945
P - 1946
Q - 1947
R - 1948
S - 1949
T - 1950
U - 1951
V - 1952
W - 1953
X - 1954
Y - 1955
Z - 1956
Month of Manufacture:
1 - January
2 - February
3 - March
4 - April
5 - May
6 - June
7 - July
8 - August
9 - September
10 - October
11 - November
12 - December
Bob's 2pdr gauge is K2, or Feb 42. That's just about spot on for the 2pdr contract!
Cletrac's 579 X gauge is N8, or Aug 45, so I would say that the red outlined face is for postwar 45-46 models.
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