Intercom - Sigtronics SPA-400, S/N – 6018112., Sigtronics Switcher System Model

Sigtronics Intercom (C-50b) SPA-400

Sigtronics Transcom ii SPO-42 Intercom plus Peltor 7004 Headset with travel case

SIGTRONICS SPO-42 4 WAY AVIATION INTERCOM PAIR

Sigtronics SPA-400 Panel Mounted Intercom (Volts: 12-24)

Sigtronics SPA-400 Panel Mounted Intercom

SPA-400 Sigtronics Panel Mounted Intercom w Round Face (12-24V) (Core)

Sigtronics SPA-400 Intercom P/N: SPA-400