Rotated for a better view, these appear to be commemorative replica Olympic medals from different years.

Paris 1936, Amsterdam 1928, Los Angeles 1932, Berlin(?) 1936, (unreadable Roman numeral)

Helsinki 1952, Melbourne 1956, Rome MCMLX (1960), Tokyo 1964, (unreadable but it's Munich, 1972)

The Paris one is confusing because it LOOKS like it says 1936, but that's the wrong year, it should be 1924. Could just be JPG artifacts.

Because they all have identical ribbons, they were likely produced as a set all at the same time and so can't be older than the newest date you see, 1972.

Each Olympics, the ribbons are different so you wouldn't see medals from all those years having the same ribbon. Also these appear to be pins, legitimate medals are hung around the neck.

As for value? No clue, an Olympics collector would likely buy them. You can get the metal tested to see if it's precious or not.

Aha!

"Medals of Memory". Found a set of 7 on Ebay for $170. So about $25 each.