[quote=topgun]A friend called last night wanting my opinion on a Fox 20-bore ejector gun. He sent a few blurry pics so that I could tell it was an A Grade, but the serial number was 5 digits; 27XXX. My McIntosh book is packed away but I told him that, based on my McIntosh recollections, Graded Fox 12-bore guns were in a serial number block from 1-50000, 20 gauge guns in a 6-digit block beginning at 200000, and 16 gauge guns in a serial number block beginning at 30000. If I was correct, the gun in question would be a 12-bore; but I could be way off. Please advise.[/quote

It is not likely a missing final digit. That would imply that there were over 70,000 20 gauge graded guns made. Only about 3500 were made.