Part Number: 12FX539 (Ne) Part Number: 12FX8 (Mix) Part Number: 12FX8A (Electron tube) Part Number: 12FXF11 (No description) Part Number: 12FXF12 (No description) Part Number: 12FY100 (Ne) Part Number: 12FY101 (Ne) Part Number: 12FY101BOUR (Ne) Part Number: 12FY101M (Ne) Part Number: 12FY101P (Ne) Part Number: 12FY102 (Trimpot) Part Number: 12FY102M (Ne) Part Number: 12FY102P (Trimpot) Part Number: 12FY103 (Ne)