This just in from Gunnar Andreassen:
[Enclosed is a great poster with Musse Pigg (Mickey Mouse), made in connection with the Childrens Days in September 1937 - and a boat race in Stockholm. I found a small version of it on the web, but with the help of Lasse Emanuelsson - who bought the last copy of the exhibition catalog with this poster they had at the Royal Library in Stockholm, I got a high resolution version.
Musse is standing on top of Stadshuset (The Town Hall) in Stockholm. See also photo of the building.]