For assistance with this, guitar experts and enthusiasts can be found in various guitar forums. To accurately date a guitar, it’s crucial to consider its external features and match them with the correct decade. Additionally, certain brands reuse the same guitar serial number every 10 years. The coding methods of each guitar brand have undergone frequent changes, leading to some brands having overlapping serial numbers with different coding methods. To find the manufacturing year of your guitar or amplifier, you need to check the serial number format specific to that brand. However, incomplete registration records and illogical guitar serial numbers may result in an unclear history of the instrument. To find out where your guitar’s serial number is located, see below. The year of manufacture of a guitar or an amp can sometimes be determined through its serial number.