The year 1936 simply may have meant something to someone. I've seen dimes placed in bezel's to be worn on a chain, the dates on the dimes having some importance, be it a birth, anniversary or something. I do not see anything on the rim there to attach to anything, so as other fella's have said, a "lucky" penny? The year may or may not have any special meaning. A very neat find though, it makes it a better find than "just" a 36 wheat.