1986 Sonor Performer PLUS beech BD shell in black lacquer finish. Shell is structurally sound, perfectly round, and is drilled to accommodate the Sonor box-shape lugs and mounts of the 1980s. It is not a wrapped finish, but black lacquer, and while there are some dings and flaws it is perfectly stage-worthy. I have done my best to try to capture any concerns in these photos. (Some of them were impossible to capture clearly with an iPhone.) There is some old, dried gray duct tape residue inside the shell.
I've had this drum validated by two renowned Sonor experts --- Uli Frost from Germany, and Scott Logsdon of the Sonormuseum --- and the following description is from the Sonormuseum site: "Early shells are 6-ply beech with rounded bearing edges. (Bass drums are 9-ply) Performer PLUS sets in mahogany and lacquer finishes are 9-ply beech with 45° edges."