NEXT Wednesday Christie's will conduct a major Guinness sale at the auction house's South Kensington premises, but the items on offer do not come from a home belonging to the brewing family. Instead, the auction comprises almost 250 lots of advertising memorabilia associated with the drink, not least the colour lithographs shown here, which date from 1942 and are expected to make £200-£300 for the four. There are plenty of examples of Guinness bottles and glasses, ashtrays, free standing Toucan figures (even used for lamp bases and wall hangings), cufflinks and badges, trays and brochures. Likely to attract the highest prices of all are instances of original artwork by such people as John Gilroy for Guinness advertising campaigns earlier this century; gouache designs are expected to fetch between £300 and £700 each.