Brick Square Post Office is a MOC modular building and depicts a British style Post Office set some time during the 1950's. There is much more to it than just a Post Office though. The model also includes A Fish & Chip Shop, Sorting Office, Cafe, and an Office. The model is designed to appear as 2 separate buildings situated around a small town square and also includes a vintage mail van.
The instructions are presented as a high quality 265 page PDF file with all the steps needed to construct each section of the building and the mail van. They also a include a printable page which can be used to print stickers to be used on the Post Office sign.
Check out my Bricksafe gallery for more pictures and to see a couple of sample pages from the instructions. There are also many more pictures on my Flickr page