Some projects take longer than others. I recently set a personal record. I purchased a 1959 Dawson in serious need of TLC at least two years ago - possibly more, and I finally finished it. I don't really remember how long I've had it, it's been that long.
The Dawson was introduced in 1959 and made for three years. It was available on either a bracelet or a strap, the former added $10 to the purchase price. I don't think I'd call it a rare model but it's not a model that I've seen terribly often either.