Add to Cart Quick view HP 70311-90000 Operating and Calibration Manual for 70311A/70312A Clock Sources HP Was: $34.20 Was: $80.00 HP 70311-90000 Operating and Calibration Manual for 70311A/70312A Clock Sources c.1991 Condition: UsedThis used manual appears to be in good condition. Please view our p 38057 SKU: 38057 Weight: 2.00 LBS