In the movie "Back in the Future" found a film mistake with hours. Nobody noticed it 40 years

Despite the cult status of a picture which all reconsider with an enviable regularity, nobody could notice this director's mistake. It is a question of a scene of acquaintance of Martie and Doc during which the scientist tried to prove that his car not simple, but capable to move in time. Where founders of the movie overlooked? In a scene of acquaintance of two main characters Doc tells how its true pesik Einstein was postponed to a minute in the past. It has also proofs — on a neck of a dog hours with the timer, round and with the black dial hung. But in other scene Doc takes them in a hand and it appears that...