Complex sentence: In 1937, Ray Whitley had worked with Gibson on the production of the famous Gibson J-200 acoustic guitar, which has since become an American icon and has been played by hundreds of different guitarists over the years.
Split into simpler sentences: In 1937, Ray Whitley had worked with Gibson on the production of the famous Gibson J-200 acoustic guitar. The J-200 has since become an American icon and has been played by hundreds of different guitarists over the years.