IIRC per Bob Runde, 87 was the year they went to pantograph points and nickel rings as standard. The stitch ring, which can still be ordered from Schon, was standard until 1987, where the nickel ring was an upgrade. I want to say the nickel ring was a $35 upgrade. It looks like an R-6 variant with inlays or and R-12 with without the boxes in the buttcap.