Who doesn?t like the external simplicity and internal complication of a monopusher chronograph" OK, there?ll be a few curmudgeons who want a double quota of buttons to play with but for the rest of us, a mono is cool.  
There?s history at play here too. It?s always tricky to say that so-and-so firm was first with a new complication (after all, remember when Louis Moinet came along and pre-dated Rieussec?s ?first? chronograph"), but Longines stake their claim to the first commercial wrist chronometer in 1913. That was a monopusher and intended to make it easier for doctors to time patients? heartbeats. All Doc had to do was depress the single pusher, count thirty heartbeats, click it again and read their patient?s pulse from the red pulsometer scale on the dial edge.
It wasn?t long before these natty new wrist chronographs intended for medics found themselves trackside and timing those new fanged motor cars as they raced around circuits. And pilots found them handy too for time/distance reckoning. And a single button meant less chance of giving the wrong one a shove by mistake although, to be fair, this probably wasn?t the intention.
Alpina made monos back in the 1970s and have had a resurrected monopusher on the list for a while now. While it might look like some of the other seventies-esque offerings from other makers, as well as heritage it has another ace up its single sleeve – its movement. 

Not for Alpina a workaday movement from Sellita o...