Just found this thread. Duplicated serial numbers ?!?!?!? I have had my OD-1 since 1982. Anybody win the one listed as serial number 0400 ? Are there other duplicate numbers ?
The 4 digit serial numbers aren't really serial numbers so there will be lots of pedals with the same serial numbers. The numbers are really month numbers starting at 6400 and ending at 0500 when Boss introduced 6 digit serial numbers instead.
As a shopper it shouldn't really matter if it has the Silver Screw. Most people aren't trying to fool anyone...it is just an old pedal. BTW, those are good prices for the OD-1....