Items of jewellery including vintage Rolex and Patek Philippe watches were taken during an early-morning break-in on April 21.
The owners of Ana Rocha Bar & Gallery, where the heist took place, have offered a £5000 reward for any information on the burglary, adding that some of the items are of sentimental value.
CCTV footage was also released and can be seen in this video made by the gallery to raise awareness of the theft.
The crime reference number is 20BW/81457U/17.
