Every tool box, whether it belongs to a serious craftsman, or an "average Joe" homeowner, and everyone in between, should have a simple block plane in it. They're so versatile and absolutely perfect for so many jobs. Set properly, with a super sharp cutting iron, they can trim end grain for the perfect fit, or knock the edge off long grain for a smooth finish. Any time I'm working with wood, there's usually a block plane on my bench within reach. Block planes were manufactured in several different patterns, some more useful than others. The basic block plane is usually about six or seven inches long, with a fixed non-adjustable throat, and an iron bedded at approximately twenty degrees.
Stanley #9 1/4:
Over the years, Stanley and others made dozens of different block plane patterns, and literally sold millions of them. The #9 1/4 was about as simple as they come. It was most probably marketed to the homeowner as an inexpensive, easy to use, handy tool. Although one could use it for fine woodworking, it is probably more suited to DIYer applications. Sturdy and dependable, it can handle most general woodworking jobs and deliver acceptable results. Stanley manufactured the #9 1/4 from 1947 into the early 1980s. The #9 1/4 is a relatively easy plane to come across at garage sales, etc., and not really expensive. If you've never tried a plane and wanted to get the hang of it, this is a good one to start with.
The plane depicted below is a Stanley #9 1/4, Type 23, produced between 1956 and 1959, at the end of Stanley's truly golden age of hand plane production.