I bought one off ebay, cheap new aftermarket and found the same thing "no chiseled timing mark". Decided I would lay the new one over the old one back to back or on top one one another and transfer the mark. When attempted this I found the new mark, it's not a chiseled mark but a laser etched faint line, it's there just hard to see and looks different. I did re-chisel the etched line once I found it so it's more user friendly
For other situations I've don't this measurement of the old stator to set the new one, came up with 6mm