Ω

An unidentified lacquer cutting engineer who initially worked at Ter Mar Studios during the 1960s and later went on to work at RCA Studios, Chicago / RCA's Mid-America Recording Center, Chicago, Illinois. They can be identified by an omega symbol ("Ω"), often enclosed within a circle, etched into the runout grooves of vinyl format releases. This may be misinterpreted as a theta symbol ("Θ").