7-Line Dyna-Sonic Chrome Over Brass (COB). While later models moved to a standard 5-line pattern, the 7-Line centreline detail marks the early, most highly sought-after era of metal shell mastery.

This is the drum that permanently solved the problem of snare choke. Equipped with the legendary, patented Floating Snare Rail System, your snare wires are held at peak uniform tension across a dedicated frame. They make flawless, uniform contact with the bottom head without choking the natural, rich resonance of the custom shell.
In superb un detailed condition.