Yep, this is the car Rosner Msp in the US had for sale for over a year. I enquired extensively with a view to bringing it into the UK. However, I couldn't establish a bullet proof date of manufacture. Our own ACOC factory records seem to show manufactured Jan 1986, but vehicle records seem to show 1985.
I'm guessing, even knowing AC, this is little more than a clerical error. However, as it was coming into the UK, it was more vital than usual, as 'classic' cars over 30 years old are treated to only 5% duty and VAT, as opposed to 30% on a 29 year old car.
In the end I'm glad I waited for a UK rhd car. Those US additions (bumper rubbers and wing lamps) would have been expensive to remove.