I have a large classic Sebenza marked "Classic" and "MM" on the outside of the scales and marked "A 04" and "B 04" on the inside of the scales. Aside from the CRK logo, those are the only markings that are visible on it either inside or out. Is there any way to determine what type of blade steel is used on this knife? Assuming that these markings indicate that it was made in 2004 (do they?) then does anyone know if only S30V was used in '04?