I've recently begun adding Finnish modernist jewelers marks to the Finland Date Marks page. This week I've created pages of examples of their work, the image pages are accessible by clicking on the "pics" next to the maker's name. I still have a couple left undone, they'll be up in a few days.
In future, as marks are added, whenever possible, example pages will join them.
ps. If anyone would like to donate images of Finnish jewelry from their collections, please contact me by private message.