I'm in the process of building postmark pages for my German Colonies collection. This meant building pages for each post office, each naval vessel and shipping line calling on the colony, railway postmarks, auxiliary postal markings, censor markings, and a few random markings that were known to be used in the colonies.
I have a page for each postmark, with a sample (if I can find or build one) at top right. I then include information on the post office, postmark, and in the case of ship post, the ship. I left enough room in the middle of each page to include several copies of stamps or stamps on piece, or a single postcard or small cover. I have to do a little re-arranging one some pages to accommodate things like translations or photos.
Here are a few samples:





