There are for example 2 articles:
The article https://en.numista.com/catalogue/pieces682.html describes 1 franc
and this one https://en.numista.com/catalogue/pieces691.html describes 50 centimes
Question. Why there are Matte flan in 1 franc in year distribution
and the same variety is absent in 50 centimes?
Should it be added to 50 centimes for 1897,1898 and 19000 as well?
then the lines are as follow:
1897 KM#854.1 Antique Silver, matte flan
1898 KM#854.1 Antique Silver, matte flan
1900 KM#854.1 Antique Silver, matte flan
This variety is well known, see for example http://www.lefranc.net/monnaie,50-centimes-semeuse,190.html