It’s not often watches are innovative in aesthetics and mechanics, especially when the mechanical side is rethinking one of the most classical mechanisms in all of horology. The MB&F Legacy Machine Perpetual ticks all the boxes. I urge you to read up about the perpetual calendar mechanism and check out MB&F’s “how it works” video.
This is the first WG piece I know of to hit the pre-owned market. It is like new with box and papers and still under warranty plus eligible for extended warranty with registration.