Dating old gibson amps
Some earlier specimens from 1903 to 1907 did not slant the logo, or went without a logo entirely.
Specimens built before 1902 had a star inlay or crescent in place of a logo.
Per Blue Book and Fender Consumer Relations Department.
If you know the backstory around when the instrument was purchased, this can provide some rough clues about its era.
The most general physical piece of evidence on the instrument, however, is going to be the logo on the headstock.
In order to date a Fender amp or provide the value, you need to know one of the below: * The 2 letter date code rubber stamped on the Tube Chart, or * The 2 letter date code on the QA Sticker, or * The Transformer Number that starts with “606-XX-XX”, with the 3 or 4 Xs being the unknown numbers that need to be provided by the owner of the amplifier asking the question.
: The transformer number tells you when the transformer was made and not necessarily the date the amplifier left the Fender Factory, the “2 Letter” date code on the Tube Chart or QA Sticker actually tells you that and that makes it the most accurate option for dating the month and year it was made....
The block logo debuted after WWII and remains the face of the company.
The type of face, grille cloth, type and number of speakers, type and number of knobs, etc.
only come into play when you’re trying to value the amplifier in the Blue Book for Guitar Amplifiers per the model description that is provided.
The original logo featured the words "The Gibson" inlaid in pearl at a slant, with an almost hand-written cursive font.
This is sometimes referred to as the slanted script logo.