I like the size and case of the 1858 Monopusher better but prefer the dial colour of the 1858 Tachymeter. As to movements, both are finished to the same level, so...
So close, so different at the same time. 44 mm polished case, without beveled lugs, on your left / 40 mm brushed case, beveled and thinner lugs on your right. Both mono pusher Chronographs, but one is located in the crown, while the other is at 2 o clock....
heard from a VERY SERIOUS COLLECTOR that the earlier versions have better finishing... these would be dated in the very early blue dials... why? Once MB saw the popularity (let's face it--they never had a hit on their hands) they increased the production ...
I like the size and case of the 1858 Monopusher better but prefer the dial colour of the 1858 Tachymeter. As to movements, both are finished to the same level, so... So are you tempted to get the other one, too?
The monopusher on the crown does it and that blue gives you that sensational feeling ) If I would have the option and the money Iโd go for the blue 44mm