NGC 8.0...somewhat uncommon and they carry a bit of a premium https://www.oldslabholders.com/post/ngc-slab-generations: Generation 8.0 - Uncommon. Produced Aug 2000 - Sept 2000. Holder used for 4 weeks. It features a revised front label with serial number moved below barcode. Rear has slightly larger hologram than Gen 7. It proved unpopular and was quickly discontinued. ...the T (toned) and W (white) lasted longer than the 8.0 holder but also went away fairly quickly since it wasn't too popular. Here is a thread from this forum that has more details: https://www.cointalk.com/threads/the-ngc-t-w-designations-the-lost-designations.208532/