
These are varieties and I was interested to learn that this dot situation is present on the 25 Centimes of 1916 as well. This issue came up when I was writing my article on the 1915 Ghent (aka Gent) coins of the German Occupation. The ones that are brass on one side and copper on the other. The 1 Franken piece had square dots separating the 1.1.1919 REMBOURSEABLE date, but is also listed with one of the dots missing. Then I came across examples with the dot faintly disernible, I concluded that it probably shouldn't be listed, as in KM, as a separate variety. Just a case where the die gradually became filled. You can access photos of all three varieties (all my modest Belgium collection) at my Moneta Coin Museum at:
http://www.moneta-coins.com/showgallery.php?cat=567
The link below will take you to the description and article link for the ‘standard’ issue with both dots:
http://www.moneta-coins.com/showphoto.php?photo=3294&title=belgium1-franken-ghent-wwi-german-occupation&cat=567
Finally, the direct link to the .pdf article that appeared in Numismatics International, the “Bulletin” at this .io link:
https://groups.io/g/Moneta/files/Moneta%20Library/Ghent%20Belgium%20Emergency%20Coins%201915.pdf
Please let me know if there are any issues with linking to the Museum and/or article. The article covers the coinage situation in Belgium during the occupation and presents new research that was previously unavailable in English.