I wouldn't focus on the 220 bezel, its an oddity an in some circles it has some value, but what about the watch itself - isn't that more important really? I'd first pay attention to the overall condition of the watch. A 1969 pre-moon Speedmaster is a great watch, I have one myself and love it, and so start there and if you love the watch, having a 220 bezel is an extra benefit. That's how I would look at it. If you want help assessing the condition of the watch, more pictures would be beneficial.