Roland JC-60 Jazz Chorus

The Roland JC-60 Jazz Chorus is a solid state amplifier with built-in chorus. It is identical to the JC-120, except it has one speaker.

Andy Summers' Roland JC-60
The Roland JC-60, like the JC-120 was one of Andy's choices for amplifiers to use with guitar in the studio. He used it on albums from Zenyatta Mondatta through to Synchronicity with The Police.

Stewart Copeland's Roland JC-60
The Roland JC-60 was one of the amplifiers Stewart used to use on the Roland RE-301 Chorus Echo, besides the Fender Twin. As per photographic evidence, he was using this amplifier for concerts between October and November 1979, often seen to his right with the setlist taped on. Subsequently, he retired using amps for this and instead sent the signal direct to the PA.

This can mean Stewart bought this specific amplifier from Manny's and tried it out with the Chorus Echo in soundcheck on 2 October 1979 at My Father's Place. He specifically remembers trying out the Chorus Echo during that same soundcheck and developing the echo effect then. But there is proof he did that before October 1979 - more information here.