There are always exceptions to these rules, the two listed below are worth noting: These contain a four digit batch number stamped in ink, followed by a two digit sequence number written in red pencil during WW2 only. The and later relector knob has a deeper post hole the bottom of the post hole comes much closer to the metal cap. Factory Order Numbers with 3 or 4 digits, followed by a hyphen, followed by 1 or 2 more digits, ink stamped on neck block flattops or on the inside back, If so, then just look at the pre-WW2 serial number and factory order number info. Guitars with nickel or chrome hardware should have silver caps.
Vintage Archtop Gibsons Collectibility.
Gibson Serial Numbers - Guitars Collector
The handle on the medium and high grade cases was leather covered metal. Hence the FON number could be one year, and the serial number the next year. The FON number is stamped on the instrument very early in the manufacturing process. From toa consistent letter code resumed, with the letter appearing before the batch number. For the most accurate identification contact. All stamps in the same size type. Vintage Reissues and Custom Shop Models, to present.