Good evening, I have the opportunity to buy a Speedmaster Teutonic in pretty good conditions, the price could be pretty fair. What do you think about this specific model? It is caliber 861. Is it worth collecting as one of the few good watches to have? I already own a Speedsonic bought by my father in the 70s. Here you have the photos of the watch I would like to buy, the price is about 2000 dollars. Please let me know what you think.