National Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.

National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.
National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.National  Triolian Resophonic Guitar (1931), ser. #972 P, black tolex hard shell case.