6267/EF86 GE AF Pentode Tube (NOS/NIB),6267/EF86 GE AF Pentode Tube. Intended for high-quality audio preamplifier service. New old stock. No longer available for export. MFR: GE. SKU: 6267,EF86 Philips 6267 NOS Mesh Plate Holland Heerlen 1967,EF86 / 6267 TAD Premium Selected,6267/EF86 GE High Transconductance Sharp-Cutoff Pentode Vintage Miniature Vacuum Tube 9-Pin NOS New Old Stock in Box,