1977-8 W. Michael Lewis / El Coco keyboard question

i absolutely love his portamento lead-melodies - can you tell what was he using at the time judging by the timbre?



i call it a "drexciyan lead" but he used it many years before them:







^2:14 and on..







^42nd second and on..









^1:30 and on..





i understand you've heard thousands of similar sounds, yes agreed, similar..but i gotta know what this exact one was.

1977-8 W. Michael Lewis / El Coco keyboard question