Clavia / Nord DPP1 from 1983 (?)
The first (?) product from Clavia / Nord
(this unit repaired by Ricard @norduserforum.com)
nordkeyboards.com: "In 1983 founder Hans Nordelius created the Digital Percussion Plate 1 – the first drum pad allowing for dynamic playing using sampled sounds. The DPP1 was an instant success and soon thereafter the brand name ddrum was introduced. The innovative ddrum pads featured real heads and hoops and gained huge popularity – many people still regard them as the best digital drum triggering system around!"