The owners of the Curiosity Shop have released CCTV footage from the robbery that saw thousands of pounds stolen.
In the video three men in hoodies and balaclavas can be seen quickly entering the office of the High Street gin and cocktail bar and reemerging just seconds later.
Lincolnshire Police said the theft from a safe happened between 2.25am and 3.30am on May 14.
As previously reported, owners are offering a cash reward for information which leads to the arrest of the culprits.
If anyone has any information about the break-in they are encouraged to contact the police on non-emergency number 101 or by email here quoting incident number 201140518. They can also contact the Curiosity Shop directly here.