The Duchampian idea of readymade as household tool abstracted from its useful context receives new nuances in Indian artist Subodh Gupta’s "Chimta" series, which assembles thousands of steel bread tongs into monumental aggregates. One such piece, from 2003, will be auctioned off at Christie’s in London next week. Estimated sales price is in the $250,000 to $350,000 range.