That was the time when Japanese auto market was orthodox to the normal sedans. When things were common Nissan thought of creating some new era of Japanese car market!! In 1969 Nissan bought 'Prince' motor company which was based in japan.And yeah that was the original manufacturer of the C10.The first GT-R Skyline appeared in February 1969. Called the PGC-10 (KPGC-10 for later coupé version) internally and Hakosuka by fans. Hako means Box in Japanese, and suka means sky!Hence the name skyline.