Which altec speakers do I have?

I bought a pair of altec lansing speakers.The guy I bought them from bought them new and said they were voice of the theatre cabinets with sro woofers and altec lansing horns.They are very large. 48 inches high,31 inches wide and have a horn on top that radiates out of the cabinet.They have regular stereo speaker connectors and the horn and woofer cabinets are the same but separate pieces. They have handles on the sides of the cabinets.And the woofer cabinet has an adjustment for the tweeters highs. They are the finest sounding speaker I have ever had and I have had some of the best.I know they are old but any information about them would be appreciated.The woofers are 15". 89vett