I'm new to the forum but thought I'd post my thanks to Nad (Ndgal) at Chronoholic.com. I bought a
1969 Omega Speedmaster Professional 145.022-68 ST "Transitional" watch from him and the transaction went smoothly. The watch has the vintage features I was looking for, such as: the DON bezel, the applied Omega logo on the face, the pre-Moon caseback, the flat bracelet, the Omega Extract document, etc. And it is interesting that the watch was made on July 3, 1969, which is just 17 days before the famous Apollo Moon Landing on July 20, 1969. He answered all my questions, sent me extra pictures, and gave me time to make the purchase decision without any sales pressure. He was very honest about the pros and cons of this particular watch. He even had the Omega box for the watch in his inventory which I also bought. He shipped it overnight using FedEx and it arrived in great condition. I can highly recommend Ndgal if you're thinking of buying a watch from him.