Heineken Pilsner

I came across a Heineken bottle bearing this label at a garage sale. At first glance, the label looked identical to all the others that I've ever seen; however, upon closer inspection I noticed that the label read Heineken Pilsner rather than Heineken Lager Beer. While a Pilsner style beer is in the Lager family, there is a difference. I'm investigating this and will post updates when I learn more. If you know anything about this, please leave a message in the Beer Hall.