Q: What is the age and value of a barometer I have? It is circular, eight inches in diameter, hangs on the wall and has Lovely Day For A Guinness in gold letters around the wooden edge. It is in working order.

Mr M

A: This item dates from the 1950s, part of a vast range of advertising and promotional material produced by the famous drinks company, mostly for display in pubs. Other wares included various pottery models of the Guinness toucan, table lamps, cigarette lighters and even coat-buttons. The barometer is worth about £65.

Prices of other pieces can vary greatly depending on rarity. Much Guinness ware was illegally reproduced in the 1990s bearing a fake Carlton Ware backstamp (Carlton made the originals) and these copies are worth very little.