I had the 3594.50, it was the piece that started my affair with vintage speedmasters. I really loved it, except the case was a lyre lug. That was why I started getting into the straight lug speedys.
My 3594.50 developed a corrosion issue on the applied metal logo, and a lot of examples on the net have corrosion on the hands, be careful. But other than that I think it's a lovely piece.
I thought that with the 60th speedy being released the 3594.50 would decrease in value, but I think that the 60th helped the 3594.50 increase in value instead. I got mine for mid-2k around 2 years ago, now I see them for base 3k.
Some pics to sway your mind
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