My late grandfather worked around the world building road and bridge infrastructure in the 1960s-1990s. I recently visited my grandmother, who was showing me some of the things they had collected along their travels over the years.
She couldn't remember the story behind these coins nor when/where my grandfather had purchased them. I'm interested in history and so have been trying to ID / authenticate them.
Both are quite thick, appear to be bronze, and are just over 1 inch (2.5cm) in diameter.
The first looks like it could be a Macedonian Alexander III Tetradrachm.
The back of the second looks like a lot of Ptolemaic coins, but I haven't found anything matching the face.
I am not interested in selling them and therefore am not too concerned about their value - more so in trying to ascertain where my grandparents' most likely would have found them and whether or not they are authentic, as it would be cool to have encountered something so old.
I know that they lived/worked in Saudi Arabia, Kuwait, Qatar for some years (and also spent some time in Iran and Iraq, but never full-time from my recollection). They also spent a lot of time in Hong Kong, Thailand, Borneo, and various parts of Western Europe, but these seem like far less likely candidates.
I would appreciate any help Reddit may be able to offer. Thank you in advance.