Harmony were one of the many guitar makers to jump on the ukulele bandwagon when they first became popular. Their ukes weren’t as well made as Martin or Gibson ukuleles, but they were very popular, particularly after they hooked up with Roy Smeck. They also made many ukuleles that were sold under other names. According to Jim Beloff’s book The Ukulele, Harmony were making three quarters of all the US ukuleles in the 1960s. As such, you can usually pick one up on eBay at quite a reasonable price.