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Hi.. I`m not too familiar with older audio equip. and I`m trying to ID an older (`50`s-60`s) set of transformers. The power trans.( 8lbs.) Has SNC P1344 on the case and the output trans.(2-3lbs) has the #`s 710-2017-02 with #138405 below it. They were pulled from an older church PA which included a pair of 6L6G ST tubes as well as 1 6SN7 GTA tube and 3 5879 tubes along with 1 5U4 GB rectifier. Any info on these is appreciated. Thanks.......B.D.