This coin is a nice golden color, and I would grade it EF40.
On the obverse, it shows a slightly pudgy Liberty facing to the right, wearing a liberty cap and with an olive branch behind her head. The legend reads “Libertad” and the date is at 6:00.
On the reverse, there are 3 panels arranged horizontally. The left panel shows a sheath of wheat, the middle shows a large number 5, and the right shows a cows head. The legend at top reads “Republica Argentina” and the denomination is at the bottom of the coin: “Cenatvos”.
Identification code: Argentina KM-15
Mint Mark: n/a
Country of origin: Argentina?
Composition: Aluminum Bronze (AlCu with some other impurities thrown in)
Size: 18 mm
Other details: While researching the composition material, I came across an interesting post about problems with Aluminum Bronze in engineering applications. It makes for interesting reading, although it has almost nothing to do with this coin.
Estimated Value: $0.50-$1 in EF40