My uncle's design for a mule-shoe belt buckle simply has a slightly hooked rod protruding from the back. Hook it into a belt hole from the outside and you're done.
Should be easy to do something like that for a wooden belt buckle. Partly drive in a suitably thick nail, bend it over a bit so tension on the belt will tend to hold it in place, clip it to about 1/4 inch, optionally file the end a bit so it's smooth and less likely to scratch the belt (or anything else), done.
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My uncle's design for a mule-shoe belt buckle simply has a slightly hooked rod protruding from the back. Hook it into a belt hole from the outside and you're done.
Should be easy to do something like that for a wooden belt buckle. Partly drive in a suitably thick nail, bend it over a bit so tension on the belt will tend to hold it in place, clip it to about 1/4 inch, optionally file the end a bit so it's smooth and less likely to scratch the belt (or anything else), done.
Would something like this work?
http://www.tandyleatherfactory.com/search/searchresults/1803-00.aspx?feature=Product_1&kw=buckle+back