1968 Gibson ES-335

Check the serial number on the back of the headstock — ink-stamped numbers should fall within documented ranges for 1968. Potentiometer date codes are critical: look for CTS pots (code 137) with two-digit year codes matching 1968 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. Check for original PAF or patent-number humbuckers — examine baseplate markings, wire colors, and magnet type. The ES-335's pickups should match each other in construction details. Semi-hollow body — tap test (solid center, hollow bouts). Block inlays. Verify long-tenon neck joint for this era (correct). Original Kluson or Grover should be present with no evidence of replacement (no oversized bushing holes). Original hardshell case adds provenance value.