Police have issued CCTV images and are appealing for information after two rings together worth more than £3,000 were stolen from a town centre jewellers in Garstang.
The offence took place around 1.40pm on Wednesday, March 6, at the S Carr and Son shop on High Street.
A man and a woman, posing as a couple, went into the shop and, while staff were busy serving other customers, the man reached behind the glass counter display and stole two diamond rings.
The man police want to speak to is described as white and aged in his late 50s, clean shaven with balding light-brown hair.
He was wearing a black flat cap when he went into the shop, a checked shirt, black padded jacket with hood, dark cardigan, dark trousers and black shiny shoes.
The woman police want to interview was also described as white, aged in her late 30s or 40s, slim, with shoulder-length blonde hair.
She was wearing all dark clothing with a light coloured shawl, big black sunglasses and brown leather shoulder bag.
PC Andrew Halliwell, from Garstang Police, said: “I appeal to anybody who recognises either the man or the woman, or thinks they have been offered these rings for sale to contact police on 101.
“One of the rings is described as a single stone diamond ring, with a platinum shank and setting ‘faux tension set’ style. It is valued at £ 1,350.
“The other stolen ring is valued at £1,605 and is a single stone diamond ring with eight small diamonds set in pairs in to the shoulders; central round brilliant cut diamond four claw set.”