Those might be 1/2 Reale or maybe 1 Reale. Mexico mint. I see ones like that going for usually less than $100 on the Net. But many are less, I guess it all depends on the year, and quality, such as Fine-F, Very Fine-VF and Extra Fine XF. Many are worn badly and of course these dont bring much. Yours are in good shape, and easy to see the markings. If I was you I would hang on to them.