The fonts on different dia.bolts look different, to me. Some of the fonts look more like the later generation fonts, but none of the fonts look like original. I wonder if different mfg'rs make all bolts diameters or if different mfg'rs make different dia.bolts. Around 03-04, i rec'd some bolts from Nishimatsu Restore Shop, the font on the 6, 8 and 10mm dia.bolts was, as i remember excellent, but none had the little dimple.