Excellent working pair,the power supply updated,signal caps updated, NOS tubes, 100% working. One has the black and one has the dark blue chassis, but identical circuits. Some pitting, but presentable. Some rust spots on top of one transformer. All original as it should.....classic, the best sound from old McIntosh tube amps. RCA black plates 6L6GC, Telefunken 12AX7, Mullard 12AU7, RCA 12BH7, RCA black plates ST type rectifiers...just the tubes worth over $500.00 May trade for Isoclean PT-3030G IV and cables.