Wow, this will make you choke. The ad is from January 26th, 1969 in the Washington Post.
You know the building. You’ve probably passed it many times, or maybe you know someone that lives there. Check it out on Google Street View.[googlemaps https://maps.google.com/maps?ie=UTF8&ll=38.906931,-77.035446&spn=0.047755,0.039997&t=m&z=14&layer=c&cbll=38.906869,-77.035465&panoid=h_2QTt9IuzrC-JM66yUo7Q&cbp=12,183.33,,0,-16.22&source=embed&output=svembed]