At about 10.30am on Wednesday, 23 July last, a man and a woman, accompanied by a child. went into the premises at Crescent link in Derry’s Waterside.
And while the man distracted a member of staff, the woman picked out a purple Affinity pram and took it from the shop.
The pram is valued at about £400.
A PSNI spokesperson asked anyone with information to contact police on the police non-emergency 101 telephone number.
Alternatively, it can be provided to the Crimestoppers charity anonymously on 0800 555 111.