The second month (November, 1977) were labelled 6400, the third (December, 1977) were 6500 and so on.
The first batch of Boss pedals were made in October, 1977 and featured the code 6300 for the whole month of production. Located above the switch inside the battery compartment, these codes are stamped directly to the enclosure using black ink (or white ink on darker pedals like the SG-1). There are THREE main serial number sequences used for Japanese Boss pedals.
Trying to work out if your Japanese DS-1 is from 1978 or 1985? Looking to sell your 80's CE-2 and want to list it as accurately as possible? Here's our cheat-sheet for understanding your Boss serial number and how some of the systems work!
