Rare 1918 Gibson Mandolin Banjo Pre-Catalog MB-3: rare all original pre-catalog model with original goatskin head. Serial no. 674, XXX banjo head from Joseph Rogers Sons. This example dates to 1918 and according to a January/February 2016 article in "All Frets Magazine" by Bruce Thompson there are only 10 known examples of this particular instrument. The total estimated production was 46 examples ever made. Comes with a good hard shell case. Dimensions are: 23 1/2 inches long X 11 inches wide, 59.7 cm X 27.9 cm. All measurements are approximate.