***A:** Entire surface is shiny. Notch on left side of chip. Two ejector pin markings in bottom-left and top-right corners. Suspected to be produced by Toshiba.
***B:** Matte surface. No notch on chip. One ejector pin marking, matte inside. Pin 1 marking is shiny inside. Suspected to be produced by Sharp.
***A:** Entire surface is shiny. Notch on left side of chip. Two ejector pin markings in bottom-left and top-right corners.
***B:** Matte surface. No notch on chip. One ejector pin marking, matte inside. Pin 1 marking is shiny inside.
***C:** Matte surface. Notch on left side of chip. Two ejector pin markings, shiny inside.
***D:** Matte surface. No notch on chip. Two ejector pin markings, smaller than style C, and matte. Pin 1 dimple is shiny inside. Tends to have later date codes (mid 90s).