You'll have to first understand that Sinn EZM watches represent a line of hardcore durable and functional watches. Made for extreme conditions by extreme professionals, these watches represent a pinnacle of the ruggedness a mechanical watch can present. The Sinn EZM4 "Achilles" was designed for doctors, paramedics, and firefighters who would need a well performing watch in conditions that might otherwise destroy or inhibit the function of "other watches." Even if you are a doctor that works in a relatively excitement-free zone, you can still communicate to your patients that you are ready for front-line medic duty should the need occur.
The Sinn EZM4 has a useful feature called a pulsimeter, or puslometer.The feature works a lot like a tachymeter, but instead of measuring distance, you measure someone's heat rate. The operation is pretty simple. Pulsimeters are graduated mostly to 33 beats (meaning you count that many heartbeats to determine the heart rate. The perform the measurement you begin the chronograph on the watch and begin to count 33 heart beats. The moment you have counted 33 beats (with your finger on the stop pusher), you stop the chronograph and the chronograph seconds hand will point to the heat rate on the pulsimeter scale. Sure you could do a little calculation in your head, but this is an easier way to measure pulse.
Aside from this function, the Sinn EZM4 (which uses a Lemania Caliber 5100) also has the day and date, and a large 24 hour hand. The Lemania 5100 is sort of a rival to the Valjoux 7750 movement (though they are different), and while used less, is a very rugged and reliable movement.Read somewhere that it is the only movement that can with stand a 7 "G" pull ! The size is 40mm wide, while the bracelet is 20mm wide. The crown and pushers are placed on the left side to protect against shock and damage (when placed on the right side).
I really like that the Sinn EZM4, as is a very German watch. The colors are meant to focus on emergency and medical preparedness, but seem to be shared with the German flag (the red, black, and yellow). These are very rare watches & they are no longer being made. Actually none of the EZM models are currently in production, and are all highly sought after.And for all the watch loving doctor's out there, appreciate that you have watches such as this made for you too bad the lawyers can't claim that.
This minty piece(90%) comes with full box & papers going for $2,850(box is abit old )
SINN EZM4 Achilles阿西里斯 為消防隊與救難團隊所設計
如同以往的EZM系列，這款錶擁有特殊和專業使用的功能與外型，你第一眼就會發現，按鈕與錶冠的操作已改到左側的位置。在此之前，針對德國邊境警備隊BGS以及特殊任務部隊GSG9等特殊任務組織開發了專用錶款，而這一次為了德國法蘭克福市政府的需要，為救難、消防與救護組織，在面臨困難與需要迅速反應的急難中完成任務，設計了專用的手錶。
它在外環有二個極佳的刻度設計，因為當有特殊狀況發生時，EZM4是專業人員所依賴的配備。頻率計用於醫療救護時脈搏頻率的測量，當救難隊員拯救出每一個傷患時，只要啟動碼錶，並測量傷患十五次的心跳頻率後，按下停止碼錶按鍵，就可以依照計時碼錶秒針所標示出的數值，推算出傷患每分鐘的心跳頻率。另一個刻度的功能即是用在救難人員在呼吸上的防護，在面版的周圍右側，0-15分鐘的位置上標示了黃色的刻度，之後銜接著紅色的刻度，從15分鐘最大延伸至30分鐘。當消防人員穿著專用裝備與呼吸器進入災難現場時，這刻度讓指揮人員或是隊員了解所還能呼吸的時間，為了避免造成救護人員的自身的傷害，當超過了紅色警戒，指揮人員就會命令離開現場。
同時對這款新發表的任務計時用腕錶，賦與了一個男性的名稱，以表示我們的敬意，他是德國救援與消防組織的領導人與著名的學者，Ernst Achilles教授。他在德國法蘭克福領導消防組織23年，並且使德國的消防系統與理論推廣至全世界。
註:EZM即為德文Einsatz-Zeitmessern，英文譯為Measure Time For Operation，為特殊任務做時間測量。
■規 格 說 明
機心： Lemania 5100。
機械式結構。
自動上鏈機心。
17石。
振盪頻率28800半擺/小時。
尼瓦洛克絲合金彈簧，鈹青銅合金擺輪，鍍銠飾紋，因加百錄防震器。
防震符合DIN 8308規格。
防磁符合DIN 8309規格。
功能： 時針﹑分針與秒針顯示。
日期與星期(德文)顯示。
計時碼表﹕30分鐘針與60秒針。
頻率計算，每分鐘20-180次
救護人員呼吸時間指示。
錶殼： 不銹鋼，DIN材料編號1.4435。
防眩處理藍寶石水晶鏡面。
具雙重防水膠圈龍頭與龍頭防護，左置設計。
具雙重防水膠圈按鈕與按鈕防護，左置設計。
防水符合DIN 8310規格。
防水測試達20 bar。(相當於防水200公尺)
負壓測試。
尺寸： 外徑﹕40mm。
錶殼厚度﹕15mm。
重量不含錶帶﹕86g。
錶帶寬度﹕20mm。
面板： 黑色面板夜光刻度指示。
9點鐘方向日期星期顯示。
計時碼表﹕計時秒針與分針在中央位置。
救災人員呼吸時間指示，黃色與紅色。
指針： 60分鐘針，12小時針與長條型刻度具有夜光處理。
