If the chronological serialization is right in the general chart from that same site ( then those fall right in line with the 1925 date. I found a Gruhn's Guide to Vintage Guitars at my university's library. If you go back to the advertisements of that time, 1984 were to be signed. I know the person who purchased the banjos with serial numbers 19.
Earl said when Jim brought the banjo back to him in Madison, he opened the case and was not immediately fond of the new neck.
Jim thought he would do Earl a favor and refinish the resonator to match the new neck (and possibly to put his own twist on banjo history).
I paid $500, which seems to be the going rate (from what little previous sales information I could find on e Bay, craigslist, and auction-house sites) for similar instruments in the low-end range of the Gibson MB line.
It was in nearly immaculate condition, so I'm not too bummed about not getting a better deal.
There is a serial number: 8023-15, but I can't seem to track that down anywhere online either, although some sources identify 8XXX serial numbers in general for Gibson banjos as being of 1925 build.
Other features: 9" hoop, smaller than what is quoted for the numbered MB-# models I've seen around.
In any event, I'm trying to pin down exactly what model / year / etc the instrument is.
Like I said, there is no model number on the gold oval label inside the hoop; all that says is "The Gibson Mandolin, Banjo, and Guitar Company of Kalamazoo Michigan" or something to that effect. And if any body can tell me hoe to get around on this site all help is welcome.
The peghead shape and color is an interesting story by itself.
Earl had let Jim Faulkner from Indianapolis put a new neck on his banjo.
I suppose the difference in condition makes up for the difference in vintage. At first, FON's consisted of a 3 to 5-digit number, which identified the batch under progress, plus a 1 or 2-digit suffix to rank each instrument in the lot." "Up to about 1924, FON's were applied to all Gibson models.." So, you could probably just refer to your MB as a circa 1924, & not be to far off the mark ! I saw your photos and read the replys to your question.