Dating marshall cabinet
Dating marshall cabinet - dating customs from portugal
These inspection numbers can be ignored for dating purposes.
Any greenback speakers with pre-April 1968 date codes printed on the chassis leg are likely to be fakes.
Note: You might have read elsewhere that the month codes changed in 1963.
This is incorrect – they always went from A to M, skipping the letter ‘I’.
Leading zeros are usually omitted from the day of the month, eg ‘6’ instead of ’06’.
From around Dec 1971 to Sept 1972 the day of the month is usually omitted: From around June 1976 the inspection letter is no longer included.
From 1986 onwards a two digit number is normally used instead.
The code beginning with the letter ‘T’ is the model number of the speaker, for example ‘T1281’ represents a 55Hz 16 Ohm G12H.
From about mid 1983 to 1986 the T model number is rarely stamped on the frame leg because it is shown on the speaker label.
From around Jan 1986 onwards the ‘insp’ stamp is no longer used and the two digit inspection number is appended to the end of the date code instead.
To date your speaker, simply find the pair of letters in your date code and use the chart at the top of the page to decipher them.
A number directly next to the pair of letters, if present, is the day of the month.
The letter ‘T’ prefix is usually omitted from the speaker model.