1990 ZR1 Assembly Line Air Filter

[AirbusDriver]

I recently purchased a 43 original mile 90 ZR1 from the original owner. He changed the oil, oil filter, radiator fluid and air filter once/year. He kept, what he thought, was the original air filter which, came with the car.

Here is the filter...can anyone confirm it is an assembly line item?

Thanks,

Mark