That is excellent timing as I did a WTB for another Mark 1 the other day. I did like the greenish plots on the Mark 1 over the brighter yellow on the Mark 2, but this is a halfway house, you still get the yellow plots, but with the nice black dial.
The bracelet is an improvement.
I will have to give this one some thought and it isn't much dearer than the others are selling second hand for, so still excellent VFM.