Hi and welcome,
I don't think it is a postage stamp. Check the front page of your album and see when it was published. Many of the older albums, such as a Scott's International stamp album dated 1912 that I have on the shelf, had a place for a Picture stamp of the country founder, king, president, etc. near the NAME of the country and sometimes a flag stamp also. However, these were sold separately and many collector's didn't buy these accessories. Ever once in a while I come across one in an auction. Since the photo may differ, one would just have to be lucky or very historic to recognize the picture. My best thoughts on it.
By the way check the Membership contest in the contest portion of the forum as you being a new member, you received 1 point, and for the first significant posting afterwards, you received a 2nd point. If you go and do an introductory posting in the WELCOME thread at the top, you can get a third point. That's the end of the easy points

. Read the rules to see how you can get more. One way is like Triggersmob who got another point for being the first to welcome you to the forum. Everyone keeps tract of their own points until the end of the contest coming soon! I will adding another prize to the total....maybe some Aussie items!
Jim