The most deluxe and expensive Gibson-made National, this extremely rare fully-Gibson-made 17" jazz box predates and far exceeds the quality of the Nationals that were made jointly, with Gibson bodies and National necks. https://www.vintageguitar.com/18414/national-n-275/. This one is in great condition, has a wide neck that's fairly deep at the nut and seems to get thinner higher up. I LOVE the sound of this guitar, and the wider neck as well. It's beautiful, very different that any Gibson-branded 17" L-5.