Would it be the use of the word Cake instead of Rosette? :-/
That's the easiest to see. This is really a lesson in what you can learn from labels and advertisements.
The Scandinavian Cake irons appear to be about the earliest name I have seen Andresen use. If you look at the other pictures, you also see the early, non-griswold Goro and Krumkake irons. This is before he got the patent for the rosette irons. You also see that there is a wooden handle. I don't know if they were ever sold that way as all I've seen is the wire.
The Rosette Iron label says patent applied for. He applied for it in December, 1904. It was granted in June 1905. This label still shows the old style Goro and Krumkake.
The catalog that I took the picture pages from is thought to be from around 1903.
Andresen switched to Griswold style irons in about 1905, that's the dates we see on the recipe booklet he started including with the irons.
You can see from this later label he says the Rosette Iron is patented and shows the Griswold handled irons. He didn't get the patty shell (timbale) patent until 1907.
These things all help date an item. I've been looking at some old ads that Joel sent me some years back for the plett research. I'm still looking, but it looks like Andresen started selling the rosette iron by about 1898, maybe a bit earlier. He started his business in 1894.
That's about it. There's just an incredible amount of information in a few pieces of paper. We can put pretty specific dates of a couple of these irons based on this information.
I also believe the Scandinavian Cake iron boxes may be scarce.
By the way, he patented the Kornukopia iron on this label in 1906.
Tom