NOS SIGTRONICS SPA400 INTERCOM • $125 • FOR SALE • Sigtronics SPA-400 intercom never installed.TSO'd With pig tail, see Net for install. manual +$shpg • Contact Charles Hampton, A&P , - located Marietta, OH 45750 United States • Telephone: ---------- • ---------- • Posted July 31, 2025 • Show all Ads posted by this Advertiser • Recommend This Ad to a Friend • Email Advertiser • Save to Watchlist • Report This Ad