This Flygraf Heritage is a reissue of a Yema Flygraf model released in 1978, and it incorporates many of the design elements of its predecessor. In fact, it is virtually a perfect reproduction of the original model. It is part of a collection of reissues of iconic Yema models that was launched in 2018 to celebrate the brand’s 70th anniversary. The case is made entirely of 316L stainless steel, making it water-resistant. Inside its 39-millimeter-diameter, 15.35-millimeter-thick case, this Flygraf Heritage houses an ETA Valjoux 7750 movement. It is the same movement used in the 1978 Flygraf, with the exception that today’s version features 25 jewels, compared to 17 in the 1978 model. It is therefore a Swiss automatic movement, beating at 28,800 vibrations per hour. It is one of the iconic movements from the Swiss manufacturer ETA, renowned for its reliability and precision This model features a sapphire crystal that provides perfect readability of all the chronograph’s information, in addition to offering effective protection against scratches.