What car does a Mann W719/12 oil filter fit?
Looks like maybe a Vanagon—http://www.germansupply.com/home/customer/product.php?productid=17375
But that’s mainly circumstantial.
Oil filters are typically built to fit a multitude of cars, or at least every car with the same engine. There are very few car specific oil filters in production, and they’re usually for high end sports cars.