What kind of keyboard did Rod Argent of The Zombies play?

Wikipedia says he played a Mellotron on 1968’s *Odessey and Oracle. * What is he playing on Begin Here?

In this pic from a Zombies fan page, he appears to be playing a Vox organ (with the tubular legs) and another keyboard, which may be a mellotron or some sort of electric piano or clavinet.