Hopefully these pics are of high enough quality for identification
They both appear to be made of bronze or copper.
The first one is about 25 mm in diameter while the second one is smaller and about 17 mm in diameter
Image:
Roman15_Obv.jpg59.15 KB
Image:
Roman15_Rev.jpg54.68 KB
Image:
Roman16_Obv.jpg58.78 KB
Image:
Roman16_Rev.jpg50.64 KB