Re: '33/4 Su8 Inst. Pl.

Posted by Owen_Dyneto On 2011/12/25 14:06:17

Have you considered that what you're calling the "dark gray line strip" is in fact an optical (reflective) effect, perhaps enhanced by light debris or dirt within the groove?

Take a good look at the section of the enlarged photo to the section to the left and below the cigar lighter where the flash illumination was more at a right angle to the surface.