In 1974 Hamer used a four digit number stamped into the wood starting with guitar #0000 and until the launch of the Sunburst this system was used on all guitars. The Sunbursts were numbered using a different system: the first digit represents the year of production and the following four (or later five digit number) is the total number of. The current 10-digit serial numbering format that started in November of 2009 identifies where the guitar was built, the start date, and the assigned number of the guitar on that day's production schedule. For example, the serial number for the first guitar built in the El Cajon (USA) factory on July 6, 2014 is. See the explanation below. Also see Headstock Styles and Logo Styles for help determining when your guitar was made (particularly helpful if there is no serial number). Note: Any guitar with a serial number with the prefix 'SI' is Indonesian-made. Note #2: Guitars with no serial number were produced at many different times. Samick branded models did not start using serials until around 1987. Also, the Indonesian factory.

Hamer Guitar Serial Number