It is reported that 70% of the car content is of local manufacture, the rest is imported from Japan, Germany etc.

I can't find any reference as to what existing or past models their cars are based on.

If you are busting to buy one the prices are here

https://naijauto.com/market-news/innoson-motors-price-list-2018-288

The Nigerian naira is worth £0.0022 today.