Olympique Marseille Away football shirt 1989 - 1991

1989 - 1991 Olympique Marseille away football shirt. I have been trying to find out some more info on a Marseille top that I have been given. I attached two photos. It appears very similar to the away top from 1989-1990 but was made by Unisport and not Adidas.

It would be great if you could give me any info on its authenticity/history.

Message received from Denim Jerseyboy 15 March 2014.

"It's a copy jersey made by local Thailand Sport brand , Unisport. In the late 90's . I can definitely tell you Cause I've seen them before . Regards, from Thailand."