Vintage Martin 1941 000-21. We are offering this instrument exactly as we acquired it with the exception of a fresh set of strings. We believe this to have only one previous owner.
The details,
There is a crack in the bridge which runs along the line of the bridge pins, and the original Grover tuners have been replaced with modern Waverly tuners. The top had been patched under the pickguard and the bridge plate has been  replaced. The finish is original and exhibits typical deterioration with lacquer checking, small impact marks, surface scratches, compression marks and edge-chipping. 
Adirondack spruce top with scalloped rear-shifted X-bracing and natural finish, Brazilian rosewood peghead overlay, back and sides, “herringbone” wood marquetry center backstrip, multi-ply light & dark wood sound hole rosette with “herringbone” wood marquetry center ring, “lower belly” ebony bridge with “long” saddle, black bridge pins, mahogany neck with ebony heel cap, gold-color “C.F. Martin & Co.” logo decal on peghead, 20-fret ebony fingerboard (14 frets clear of the body) with mother-of-pearl “slotted diamond” fingerboard inlays, multi-ply dark and light wood binding with Brazilian rosewood exterior ply on body top and bottom edges, and other typical Martin style 21 appointments. The instrument comes in a modern replacement hard-shell case with textured black vinyl exterior covering and red plush interior lining. The neck is straight and is easy to play. Additional information and photos upon request.

4/18/24 We have lowered the price due to having a physical inspection by an authority on pre-war Martins and this is what we have learned.

The X-Brace and bridge is not original. The top has been sanded and the neck has been refinished.