Where to start
First note the face value and the date. They usually point to a single row of the table, but not always to the same alloy: a 2009 Sower 10 euros weighs 12 g at 900 fine, a 2012 Upper Normandy 10 euros only 10 g at 500 fine.
Then put the coin on an accurate scale and measure it. Those two figures separate the series better than the eye, because the fineness is rarely struck on the coin. A 10 euros of 17 g and 31 mm belongs to the 2014-2015 pictorial series, at just 333 fine.
Finally look at the packaging, which is part of the coin: blister or card for brilliant uncirculated, case and numbered certificate for proof.
Eight years of face-value series
From 2008 the Monnaie de Paris offered the general public silver and gold coins sold at face value. The Sower walking opened the way until 2010, with values from 5 to 500 euros.
The regional euros followed from 2010 to 2012: one 10 euros per region per year, 900 fine in the first year and then 500 fine. Hercules, from 2011 to 2013, revived the group engraved by Augustin Dupré during the Revolution, in Joaquin Jimenez's version. The Values of the Republic series came next, from 2013 to 2015, drawn by Sempé and then Uderzo.
Later issues became more thematic: Excellence à la française, the Smurfs in 2020, the bicentenary of Napoleon's death in 2021.
Blisters, boxed sets and counterfeits
Hardly any die varieties are known on these coins. What separates two examples is their finish, BU or proof, and the condition of the packaging. One issue sometimes existed in both finishes, with very different mintages.
Each region has its own design and its name spelled out; mintages vary widely from one to the next, from a few tens of thousands to several hundred thousand.
Fakes concentrate on gold. A weight that is off, a poorly drawn horn of plenty or an unnumbered certificate are all warning signs; see spotting a fake coin.
Look-alikes
- Monnaie de Paris tourist tokens, sold at sites and monuments: with no face value and no legal tender status, they are souvenirs.
- Commemorative 2 euros: bimetallic, valid across the euro area, with no gold or silver.
- Coins repainted or gilded by private companies: the addition changes nothing about the metal.
- Silver Sower and Hercules francs, direct ancestors of the 2008-2013 series: the word “francs” rules them out.
Keeping the original shine
A coin that never circulated does not wear: it suffers from handling and time.
- Fingers: on a mirror field, every touch leaves a mark that sets in.
- Air and damp: the 333 and 500 fine 10 euros contain a lot of copper and stain outside their blister.
- Wiping: a cloth is enough to scratch a proof.
- Knocks: the 41 and 50 g modules dent easily on the edge.
More in coin grades and cleaning a coin, or rather not doing it.