This edition of cleaned up wax cylinder recordings of early flamenco:
... and another similar edition of early flamenco specialising in forms of the Levante region (taranta, cartagenera, minera etc). In both cases the recordings are from 1890 - 1905, although many individual cylinders are undated. I've listened to earlier music recorded onto pianola, Scriabin playing some of his miniatures and Albeniz improvising, not sure of the dates though.