Keystone,1.54,Excellent,H,VS1,F254169
https://www.igi.org/viewpdf.php?r=418023810
https://www.igi.org/viewpdf.php?r=418023810
Description
https://www.igi.org/viewpdf.php?r=418023810
https://www.igi.org/viewpdf.php?r=418023810
https://www.igi.org/viewpdf.php?r=418023810
https://www.igi.org/viewpdf.php?r=418023810