The Oakley Review - Wiki (Crosshair)
There were 2 subtle Generations of the Crosshair 1.0
The initial release had only the "Crosshair" printed on the inside of the right arm.
The later release also had the "Crosshair" printing, but in addition, had the frame dimensions (63 O 16) and the SKU (05-XXX) on the left arm.
The lenses on the initial release are smaller than the later release, meaning the lenses are not interchangeable between the two (Later release could take initial release Lenses, but it would be abit loose. Later release lenses would not fit into initial release frames).
The edges on the lenses are the easiest way to tell between the generations if dealing with loose lenses. Initial release lenses were hand finished with a rounded outer edge. Later release lenses were machine finished, with an L-cut along the entire edge of the lens.
List Of Wires