signed and dated "AO 88" on the underside of the wood element

wood, hammers and black and white photograph

photograph 16 1/2 x 12 1/2 in. (41.9 x 31.8 cm)
shelf 31 1/2 x 12 1/8 x 6 3/4 in. (80 x 30.8 x 17.1 cm)
installation dimensions variable

Executed in 1988.