I agree with Brian...the lenses are cut for glass and the white areas appear to be pretty thin which is indicative of lenses made for glass bodies, since the body created the "whiteness". While it might appear intentional at the 6 o'clock area, I see other areas of weathering along the sides of the lenses, also a sign of honest use on a pump. Someone probably tried to touch up the area to make it more white, which usually doesn't work well, especially if they are lit.
Darin
