The new shape of 643. The metal rim is a titanium version of the brand's iconic Dharma Dot rim, which is also used in the 717D. The brand's original parts, the 3-pin caulking rivets are different in size, the double bridge is placed 0.7mm apart in front and back, and such as the commonly known military hinge, are placed in the details. This model is the embodiment of the design team's obsession to create a perfect brow-style even when viewed from the back.
