Police are investigating the break in at Marrburn Road, which happened sometime last weekend, between Friday and Saturday.
Thieves took watches, bracelets and rings with a value of over £3000.
Constable Alan Steel at Thornhill said “We are keen to trace the occupants of a red coloured car which was seen in and around the Penpont area on Friday evening. The car, which may be a Peugeot, was also seen in the village on Sunday 18 October 2015. The car seemed to be driving slowly through the village, and was seen to stop on a number of occasions.”
Anyone with any information is asked to call us on 101.