West African States

I noticed that there are two coin denominations, a 50 Franc and a 100 Franc, that have unique catalog numbers. The 50 Franc is KM# UC#1 and the 100 Franc is KM# UC#2.

These two are magnetic so a different number, I see that.

What does the UC# represent and why the separation between KM# & UC#.

We don't have a reference with UC (LIST) so somebody missused the reference field where KM# is the standard setting.

Anyone have a clue as to the correct catalog numbers for these two coins.

https://en.numista.com/catalogue/pieces53891.html
https://en.numista.com/catalogue/pieces53892.html

Turns out that some other 100 Franc KM#4 coins are also magnetic (1972, 1974, 2005, 2009). I haven't checked all the others that I have.

Quote: "SRV5490"​Anyone have a clue as to the correct catalog numbers for these two coins.
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​https://en.numista.com/catalogue/pieces53891.html
​https://en.numista.com/catalogue/pieces53892.html
​
​Turns out that some other 100 Franc KM#4 coins are also magnetic (1972, 1974, 2005, 2009). I haven't checked all the others that I have.

​Krause doesn't distinguish the newer magnetic ones from the non-magnetic. It only uses the original catalog numbers -- from back when all of this type was non-magnetic -- through the year 2012 (per both the NGC website/feed, and the 2019 edition 13 of the 2001-to-Date SCWC).

50 Franc KM#6
https://www.ngccoin.com/price-guide/world/west-african-states-50-francs-km-6-1972-2012-cuid-1072676-duid-1601891

100 Franc KM#4
https://www.ngccoin.com/price-guide/world/west-african-states-100-francs-km-4-1967-2012-cuid-1072744-duid-1601915

The 100 Franc coin is made of nickel per Krause -- isn't that usually magnetic?
The 50 Franc coin is Cu-Ni per Krause -- could that be magnetic if percentage of nickel varies?

Yes pure nickel is ferromagnetic and for a copper-nickel alloy to even start beeing ferromagnetic the nickel content has to be 56% and higher (which doesn't make to much sense for coin metals).