Here is a labelled SEA (mine, sold) From memory it was about 20cm. The label was very old and washed out but most of the SEA (in yellow script) could be clearly seen. I tried to photo the label but that was a couple of years ago before I got the knack and the results were atrocious and illegible.
Emmi's are rounded at the edges. This one was very square.
I have to go with Ivo's attribution for yours Emmi. Pete
Dirk, Your English is fine. If we have difficulty understanding then we'll ask. Otherwise, perfection is not necessary.