From my Records....
Simul IIC+ Coliseum OT: 0160 322 EIA 606-401
IIC+ Coliseum OT: 0180 322 EIA 606-806
But from the IIC+ Guide for Dummies
Pricing September 1984
THE COLISEUM SERIES 300
Coliseum Series 300, 180 Watts, 6 Power Tubes, Half Power Switch,
Vinyl Cabinet, 23” Wide only...