I mean, that seems to be the implication because Howard is talking about the gamma radiation from the clock tower, Flynn says that it must be "half way to Germany by now," and Zola is still traveling with it.Was there anything that flat-out said that scene was 1943? Watching the episode, I thought it was flashing back to 1942 and the SSR just became aware of him in Norway with the Tesseract a year later.