Serial number 41999 was stamped on March 28, 1930 and cleared final inspection on April 15 that year. It is from the first batch of four 0-28T guitars made.
The o-28T guitars were made in 1930 and 1931 with a total production of 70.
The tuners are Grover #90 banjo tuners.
Style 28 features:
Back and sides: Brazilian rosewood
Top: Red spruce (Adirondack)
Backstripe: Zig-zag pattern
Other period features:
Ebony straight bridge
Samll OM tortoiseshell pick guard
Slotted diamond and square fingerboard inlays
C. F. Martin stamp on back of headstock
No style stamp
Photos courtesy of Players Vintage Instruments