Lacquer, and I prefer satin finish. However since I always buff each coat with 0000 steal wool, a semi gloss would give about the same sheen.
Hey Double Duce, good to see that it arrived in one piece, and that the phones fit well. Looks like we got a good color match on the Macassar Ebony. The grain's a bit tighter, but that's hard to match perfectly, especially on a curved surface like the W5000 cups.
That shipped rather quickly.