https://www.racingsportscars.com/photo/Brands_Hatch-1989-07-23.html
World Sports Prototype Championship: Jarama: June 25th, 1989
World Sports Protoype Championship: Dijon: May 21st, 1989
WSPC Dijon Test, 1989
A test session at the Dijon-Prenois circuit, (yes, the same region of France where the world famous mustard comes from), before the race there, that would follow, two and a half weeks later.
https://www.racingsportscars.com/photo/Dijon-1989-05-04.html
World Sports Prototype Championship: Suzuka: April 9th, 1989
Sandown 360 Kilometers: November 20th, 1988
Group C returned to Australia for the first time since 1984, back at Sandown Park Raceway in Melbourne, Australia, for the curtain closer of the ’88 season. The race was actually known as the Lucas Supersprint.
https://www.racingsportscars.com/photo/Sandown-1988-11-20.html
Fuji 1,000 Kilometers: October 9th, 1988
Not only was this a round of the FIA World Sports Prototype Championship, as the championship officially came to be known, but it was also a respective round of two Japanese Group C championships, both for the All Japan Sports Prototype Championship (the national Japanese Group C series), and for a series affiliated with Fuji Speedway itself, the Fuji Long Distance Series.