1S5 Sharp Cutoff Pentode Tube. Designed to service as a detector-audio tube in a portable piece of equipment. MFR: RCA, GE, CBS, Sylvania, Tung Sol. SKU: 1S5. New old stock. No longer
1S5 / DAF91 Diode-Pentode. A vacuum radio tube by RT France #18259 | M-Ware
GE Electronic Tube Type 1S5 | eBay
One GE 1S5 Min electron vacuum tube for Old Portable Radio NIB | eBay
Goodyear Air Spring - 1S5-176 - Dayton Air Suspension and Control Products - Air Suspension Component Distributor