April 19 (Bloomberg) -- Nick Walker, an old spray-mate of fellow British street artist Banksy, sold 750,000 pounds ($1.5 million) of paintings and prints this week at the start of his first one-man show in the U.K., the gallery said yesterday.

All but two of 60 original Walker works on offer, many featuring his anarchical alter ego, ``The Bowler-Hatted Vandal,'' found ...

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