Again, it's important to be sure the parts are original on the music equipment to get a valid date for the amp.Many tube amplifiers will have a tube chart within the amp itself.This may also be helpful when dating a vintage tube guitar amplifier.
Guitar amplifier dating by serial numbers - How To Date A Guitar Amp or Bass Amp By Serial Number.
There are a number of resources available online to help you to date your guitar amplifier or bass amp.
Many of these resources refer to source-date-codes located on pots or speakers within your amplifier.
Please keep in mind that those components must be original to get a valid date for a vintage guitar amplifier.
Other sources to date your amp may include serial numbers and overall look and visual components on the amp as well.
For example, the logo on the amp or materials used during a certain time period of production.
Dating an amplifier by serial numbers can be effective as well.
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