1966 Gibson Les Paul

Check the serial number on the back of the headstock — ink-stamped numbers should fall within documented ranges for 1966. Potentiometer date codes are critical: look for CTS pots (code 137) with two-digit year codes matching 1966 or up to 18 months earlier. This is the most reliable dating method for Gibson guitars of this era. Gibson used nitrocellulose lacquer through the late 1960s. Check for natural checking and wear patterns. Under UV light, original finishes fluoresce differently than refinishes. Verify original PAF (Patent Applied For) humbucker pickups — check for the distinctive sticker on the baseplate. PAF bobbins, wire routing, and Alnico magnets should be consistent with 1966 production. PAFs are the most frequently counterfeited Gibson component — DC resistance should read approximately 7.5-9k ohms. The carved maple top over mahogany body is a key construction detail — check body weight (originals are typically 8-10 lbs). Examine the neck joint tenon — long tenon is correct for this era. Check for headstock repairs (Gibson headstocks are prone to breaking) — repairs reduce value significantly. Original Kluson Deluxe should be present with no evidence of replacement (no oversized bushing holes). Original hardshell case adds provenance value.