FIrst year of issue, early example totally original with rough white tolex and maroon grille. This was Fender’s first 80 watt amp with four 6L6GC power tubes, complete with two 1960 Jensen P12N alnico speakers with original Bluebell magnet covers and cones. This Twin has plenty of clean headroom to pierce through any mix when cranked. It also is the first combo amp to have tilt-back legs. Serial # 00041