The 80 coupe didn’t have a wiper unless you ordered the option pack.
I ordered an 80 coupe suite back in July and one of the reasons I cancelled and went back to ordering the SUV is I wasn’t prepared to pay for an option pack to get a wiper.
I looked at all the Coupe available on auto trader and all standard ones didn’t have a wiper and all those with clever pack or higher had one.
The dealer was a bit clueless.