Gibson PB-1 #9560-9

The style 1 of the 1930s was a non-Mastertone model and therefore had no true tone ring–only a small-diameter brass hoop on top of the rim.  It did, however, feature the same pot metal one-piece flange and three-ply maple rim as the Mastertones of the same period.  Style 1 had nickel-plated hardware and a dark-finished maple neck and resonator, with white binding on the neck and both edges of the resonator.  Even though the Mastertone models had by this time gone to the double-cut peghead shape, the fiddle-shaped peghead was retained on style 1, with a minor modification–the two small indentations normally found under the fourth- and first-string tuners were absent.  The rosewood fingerboard was inlaid with the fleur-de-lis pattern seen here until circa 1937 when the fingerboard inlay was changed to a simple dot pattern, although the “inverted bud” peghead inlay remained (see TB-1 #133-22, the “Roy Francis Gorman”).

#9560-9 is a plectrum-necked style 1 dating to 1930 (see Gibson banjo serial numbers vs. factory order numbers) and is housed in its original #521 Geib and Schaefer “red-line” case with purple flannel lining.  While tenor- and plectrum-necked style 1 banjos are frequently converted to five-string with the installation of a new neck, a previous owner of this banjo chose the more direct route of simply drilling a hole for a fifth-string peg into the side of the neck at the fifth fret.  While definitely not considered a “best practice” these days, as long as you don’t play with a capo and aren’t overly concerned with fretting the fifth string, it does sort of work: