2-head Reel to Reel?

My R2R has a different format on each head. What was it used for

Pioneer RT-1020 Tape Recorder

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Sony TC-280 2-Head Stereo Reel To Reel Tape Deck Near Mint Unused Box Rare Vtg , Looks Unused , Mint condition , Free, Shipping

Sony TC-280 2-Head Stereo Reel To Reel Tape Deck Near Mint Unused Box Rare Vtg

Reel to reel - The peak of audio quality and sophistication

Head relapping

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TOSHIBA REEL TO REEL PLAYER, Audio, Other Audio Equipment on Carousell

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Anyone Run their Mixes Through Reel-to-Reel Machine? : r/Logic_Studio

Reel to Reel Track Formats

2-head Reel to Reel?