I looked at my Tourist II with the 105mm Anaston f4.5 and the Kodamatic shutter.

In mine, I don't see any filter threads, just "striations" in the black ring around the glass. I've always understood these types of lenses to require a slip-on type filter holder such as http://www.songofsnow.com/26mm-to-Series-5-p/pas526.htm. This is consistent with your quoted description, which references a 1 5/16 slip on adapter ring.

Now mine is the Tourist II, not the original Tourist. But all the pictures I've seen of them seem to show the same basic ring around the lens.