I recently got my hands on a double dvd of roxy Music.
Now Id known Eno used a VCS 3 in Roxy for ever - I have one too!! - but as I watched the live sets from the early days there are these songs ...
On nthe 3rd April 73 they played the OGWT and played Do The Strand and In Every Dream Home a Heartache and Eno is playing something else. It looks like EMS Gear but looks like more than a VCS 3 with added on modules.
However Robin Wood tells me it is not EMS gear but that Phil Manzanera was rumoured to have a synth setup and it may be that.