Speaker dating

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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’.The date code is still on the front gasket but with a smaller font size.

To date your speaker, simply find the pair of letters within the date code – these represent the month and year of manufacture: Then use the reference table below to decipher them.

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.

For 12″ speaker models, use the stamp location colour codes to guide you.

If you need more help, scroll further down the page for a more detailed explanation.

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