Which guitar collaboration was NOT actually released as an official signature model?

The music industry has seen some groundbreaking partnerships between instrument manufacturers and legendary artists that resulted in signature products. These collaborations have often created instruments that defined the sound of generations and became as iconic as the musicians themselves. Test your knowledge about these famous musical partnerships that shaped music history!

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Gibson Les Paul (with Les Paul)
Fender Stratocaster Jimi Hendrix Model
Gibson John Bonham Drum Kit
Martin D-28 John Lennon