Okay, let's congratulate George Taylor of Imaginerding for knowing that the porthole comes from Min and Bill's Dockside Diner. Ever wonder about the diner? It is named for the 1930 film Min and Bill starring Marie Dressler and Wallace Beery. Min owned a dockside hotel and Bill was captain of a fishing boat. Oh, and Dressler won the 1931 Academy Award for Best Actress in a Leading Role.
And the adventure continues. Where In The World do you think you'd find this?