Anyone have suggestions for grading these? They don't seem to have any wear to speak of, but they are about the most poorly minted coins I've ever seen. Didn't the French have any respect for their colonies? (Joke, please don't beat me up....)
I would say VF just for the quality, but without any wear maybe it should be higher. Thanks.
By the way, I don't have much use for more than one of these. Any French Indochina collectors out there? I have about 40 coins I don't need, including about 20 zincs with a handful of readable ones.
Aluminum oxide is transparent and is present on just about every piece of aluminum - it can be more visibly marked by water, which leaves fuzzy white spots.
Still, aluminum stays shiny way better than zinc does.
Citeer: ardHow would patina/toning change the grade on aluminium coins such as these?
Aluminium gets very quickly covered by a very narrow and transparent layer of aluminium oxide which protects it from any further oxidation, which is why aluminium is not affected by the passing of time.