There are very few modern chronographs quite as practical or legible as the first EZM range. Developed for the German Central Customs Support Group, it quickly gained favor amongst enthusiasts and tactical users alike. After production of Lemania’s 5100 workhorse ended a few years ago, values of these (particularly 3H dials) have been on a steady run. Sinn reissued a “1.1” version last year, but the original is the true investment. It’s not difficult to see why.
Find this example here on eBay with current bidding at 4200.