On my search to a vintage Speedmaster I came up with this one. The seller says that the watch is 68-69 and has a tropical dial and ghost DON. 861 Calibre, 100% original and recently serviced. I’m not a watch lover with the most knowledge available, that is why I ask you guys and girls for a little help. The seller wants €6.000 for it. Is it a good buy, or is that too much for this one? Thank you for your time and help!