Sinn 157 with a Lemania 5100
Thanks to www.watchtime.ch for the excellent picture.
Arguably one of the best designed and best looking watches in the Sinn range, it also houses the cool Lemania 5100 chronograph movement. Inspired by Chuck Maddox's discussion about it and knowing that it was discontinued, I got one for posterity. Mine's got the optional Argon fill and Copper sulphate dry-capsule. Out of the box it's running +2s/day and doesn't seem to suffer the winding woes that afflicted my previous Sinn EZM-1. But, boy those bracelet screws were tight again, make sure you don't go in there without being armed with a quality 1.2mm slot head screwdriver! And don't forget a dab of Loctite 242 or 243 to finish.....
Check out the funky tachy and pulse DUAL scales. The first 18 s registers a "15 pulse count" scale and the remainder a traditional tachymeter scale, The dial is matte black and coupled with antireflection coating on the inside of the sapphire makes for supreme readability. The red chrono hands distinctly differentiates chrono time from normal time. Of course, the 5100 characteristic chrono minute hand makes for fast chronograph time readings. The implicit and instant readability of this approach leaves you wondering, why aren't all chronos like this? You are so programmed to read the time like that you can't believe what a difference it is to read compared to a normal chrono with a 30 min subdial.