John told me about a Sunray electric apartment range with no oven vent. When the lady baked, water condensed on the inside of the oven door and ran down onto the floor. He drilled a hole through the back of the oven liner in the place where an oven light would go and made her a vent.
Hans, are you sure that there was not a vent concealed by the broiler reflector? Theses were WP ranges, but they were built on Estate heritage so there should have been some sanity involved in the design and construction.