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This site is dedicated to the KB ITT Radios which were available in the UK during the 20th century
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Kolster Brandes Model Numbering Scheme

From about 1946 to 1964, generally but not exclusively 2 alpha characters followed by 2 numerals; See Below.

The 1st letter is approximate year. Some letters are skipped and some years get two letters. "KB" prefix is optional,

A 1945 to 1946 Minimal production, wartime shortages. 1941 to 1944 likely only Military production if any. Maybe 1944 & 1945 they made some Civilian Sets?
B 1947 (maybe delayed from 1946)
C 1947
D 1948
E 1949
F 1950
G 1951
H 1952
I (Not used)
J 1953 (TV)
K 1954
L 1955
M 1955
N 1956
O 1957
P 1958
Q 1959
R 1960
S 1961
T 1961
U 1962
V (Not used?)
W 1963
X 1964 (some TVs)

From about 1965, many models were prefixed with K
By 1968 approximately, models are ITT KB branded and then from approximately 1970 the KB was dropped creating the ITT Brand in the UK

2nd letter prefix
A Amplifier / Audio
B Baby mains radio, not always L & M can be even FM only
G Radio Gram function on a Radio
P Portable (seems pretty consistent). Battery valve or Transistor.
M At least MW Mains Radio, not baby or gram
R Radio All Wave Mostly but not always LW MW, SW (can be LW, MW & VHF), if Export then more SW instead of LW. What else might "R" stand for?
RP Record Player without Radio
S Speaker
T Tape or Transportable Radiogram Why is this RT10 not called an RG10? is it because it is Transportable!?
Usually two digits. If a 3rd digit its the same product segment as a similar earlier xYnn model, if a /n suffix then the year letter is when original released and it's a revised design. Letter then isn't the release year.

The Numbers

1st Numeral
This is probably just an indicator to identify the style, or grade in its range for the year.

2nd Numeral
This appears to indicate the type of supply e.g.
0 = AC Mains
1 = Battery
5 = DC/AC mains.

3rd Letter or suffix
Indicates alternative version e.g.
T=Tropicalised/(export version), L=low voltage(110-125)

ALPHA 1 = year See list for year codes
ALPHA 2 = type A=Amplifier, B=Baby (small) Radio, G=Radiogram, P=Portable, R=Radio, RP=Record Player, T=Tape Recorder, WR=Wire Recorder,
NUMERAL 3 = ?random number? 1, 2, 3, 4, 5
NUMERAL 4 = supply 0=AC mains, 1=Battery only, 5=AC/DC mains
ALPHA 5 & 6 = version T=Tropicalised/(export version), L=low voltage(110-125)

There are some inconsistencies:
Models with same digits and different years & same 2nd letter may be similar to each other.

Mike Edwards



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 Last modified: 27-04-2021
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