Early models simply used the last two digits of the year in the model number. So, for example, the “Master 38 K”was the 1938 model and the “Master 41 B” was made in 1941.
Later, a three-digit system was used, however, this can be“de- coded” to indicate the year as follows: The first digit is the ten’s-place in the model year, so the “JET 513 K” was made in the 1950s. The one’s-place of the year can be found by subtracting the first number from the second and third. For example, 13 - 5 = 8, therefore the JET 513 K was made in 1958.
Letters
B: Bakelite
CH:
G: Gramophone
K:
R: Radio
S:
If you have questions about or problems with B&O equipment, these should be directed through your dealer and/or B&O's Customer Service department.
I cannot be a "short circuit", bypassing these communication channels.
Thanks
-geoff