7-inch open reel tapes scotch 218 550m x1 scotch 212 370m x1 scotch 177 550m x1 sony DUAD 370m x1 sony SLH 550m x1 fujifilm FB 555m x1 These were mainly used for air checks on a TEAC A1400 in the late 1970s. They have recordings on them, but the contents are unknown due to the lack of equipment to play them. Whether they can be re-recorded is unconfirmed. They have been stored in a dry closet. These are long-term storage items. Recorded at 9.5 cm and 19 cm, stereo sound source, 4-track (both directions). They were used for playback, but were stored away after CDs became available.