there was a fella named David Comeau (dyno dave - atlantic green technical services) that was collecting data on commando frames. here is the information he was asking for and i sent --
i'll have to check on the "00126" (batch) number.
EDIT - just checked my frame for a "00126" number on the drive side an found none. since my VIN plate is shifted to the left, it may be hidden under the plate. ??????? my frame seems to be a Mk3 configuration - has brackets for the 75-Mk3 hinged seat.
side note - although my VIN tag states an august 74 build date, the build date/dispatch records i got from andover-norton state september 74 for my bike.