Sinn Mission Timers are watches uncompromisingly designed for function. Besides the ease of readability, attained by optical withdrawal of functions that are not directly required for the diving operation, such as date display or dial lettering, a lot of Sinn special technologies find application in this watch. The EZM 3 Mission Timer was introduced in 2001 as a dive watch with left-side crown. This follow-up, the EZM 3F, appeared 14 years later with a pilot's watch look but similar specifications.
The case is similar to the Sinn 104 (also introduced in 2015) and the existing Sinn EZM 3, with angular lugs and crown guards. It is reasonably sized at 41 mm and just 11.7 mm thick, slightly thinner than the EZM 3 and nearly the same as the 104. The EZM 3F is styled as a pilot's watch, however, with a “countdown” bezel. But the dial is more similar to the diver's watch line, with applied luminous markers in rectilinear shapes rather than numerals.