Because production was outsourced, there was no central, unified numbering system. Different factories used different formats. Furthermore, many domestic Japanese models (marked "For Domestic Sale Only") never had English-language records. To make matters worse, Morris re-used model numbers in the 1970s, 1980s, and 1990s.
Letter Prefix + 4 or 5 digits Example: A-5234 or C-8923 morris guitar serial numbers
Model Number + 5 or 6 digit number Example: W-50 51234 Because production was outsourced, there was no central,