For The Love Of Port

In a recent cellar purchase that is destined for auction, I picked up two bottles of Porto 1948 Vintage Port. And that's all it says in white stenciled paint on one side of the bottle. On the other side is a paper label that attributes the wine to "The Douro Wine Shippers and Growers Association". Anyone familiar with these bottles?

Can you post some pics of the bottles. Or email them to me and I'll post them. That often helps people in identifying them. thanks