I have been following the restoration of YS 760 on the Super Car sight, and have a question about my trim tag. YS 760 shows a Z, T/400 designation in area 2, and is an 06 NOR build. My L-35 is an 02 NOR build, but does not show a Z in area 2. Did that designation start after Feb, or could it be a letter that was just missed in the stamping? Thanks.