That's the "Roller Tach". IT was offered just that 1 year and while it's kind of unique, I don't know of many people who really like it as a std face tach is easier to read at a glance.
It's both a factory and a dealer option. It's also fairly rare, and very expensive.
If you're able to find one, expect to pay $200 and up, depending on the condition, redline, and if it has the bezel and lens included.