A friend found this abandoned bike for my son. I am trying to figure out the model.

It is a 27 inch frame. It is pretty banged up and scratched. It is an Apolllo. Serial number 800453198. So from this forum, I found out that it was manufactured in 1980. It does say "Made in Japan". It has "Custom Sport" painted on. Then there are decals. One says, "Mammut". One says, "Fred Deeley Cycles". One says, "Local Motion Abbotsford B.C".

Any information anyone can tell me would be appreciated.

Thanks!