When I wrote the last version of the serial number decoder I thought the ink stamped numbers went up to 0500 and that the lowest 6 digit numbers were 050000. Lately I've come across a CE-2 with serial 041300 so the last assumption was clearly wrong. Looking back at all the serial numbers I've written down I can't find any 0400 or 0500 serials and I'm starting to doubt there ever was any.
Have you got a 0400 or 0500 pedal (or 5 digit 10400/10500)? Please let me know so I can get the bugs out of the sn decoder.
I show an SG-1 with a 0400 s/n in my list that I've collected from ebay auctions. I don't know if it was pictured or just stated by the seller. I have it as a black label silver screw MIJ pedal.
I also have two 0400 s/n pedals. A black screw DS-1, and a PH-1 with silver screw. I know for sure that there are 0500 s/n pedals since I have seen an black screw OD-1 with that s/n.