I'm assuming the first one is, somewhat loosely, based on the DISCIPLINA sestertii of Hadrian.
Wildwinds page, especially the second example there. These coins are supposed to be brass or bronze, but as mentioned by others above, this one is clearly cast, and therefore not genuine.
I believe the second coin is supposed to be a tetradrachm of king Nikomedes II of Bithynia. See the examples on
this Wildwinds page. As others stated above, they are supposed to be made of silver.
I would assume they are "tourist fakes", picked up by a family member as souvenirs on a trip to south-eastern Europe and/or the Middle East. In many countries which used to host ancient civilizations, like Greece, Italy, Turkey, Egypt etc, selling genuine ancient coins to tourists is illegal, but selling them fakes is perfectly fine. Of course, they don't tell the tourists this.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis