This is another Stolpersteine plaque commemorating victims of Nazi extermination.

Inscription:

På Økern bodde
Molly Amalie
Rubinstein
Fødselsår 1913
Deportert 1942
Auschwitz
Drept 1.12.1942

English translation:

In Økern lived
Molly Amalie
Rubinstein
Born 1913
Deported 1942
Auschwitz
Killed December 1, 1942.

https://www.hmdb.org/m.asp?m=262889