Look for a paper label (often white or orange) visible through the soundhole or F-hole.
This is the most important part of the review. Many buyers assume a valid serial = real Gibson. Here’s why: check serial number gibson
| Era | Format | How to Decode | |------|--------|----------------| | 1952-1961 | 4-5 digits | Sequential; need vintage log | | 1961-1970 | 5-6 digits | Unreliable alone | | 1975-1977 | 6 digits + "00" prefix | 00 = 1975-77 | | 1977-2005 | YDDDYRRR (8-9 digits) | Year, day, rank | | 2005-2014 | YYMMDDRRR | Year, month, day, rank | | 2014+ | YYQRRRRR | Year, quarter, rank | | Custom Shop | CS + YRRRR | CS = Custom Shop, Y = year | Look for a paper label (often white or
Never rely on one tool. Cross-check 2-3 sources and always examine photos. Here’s why: | Era | Format | How