Scottish police are on the lookout for a two-metre-long 17th-century sword which was stolen from a museum on the Isle of Canna.
The two-handed claymore, which has a double-edged blade, wooden grip and a stamped fleur-de-lys, is believed to have gone missing from Canna House between June 6 and 9.
"There is no indication that entry was forced to the museum, so anybody who was at Canna House over this period may have information which could assist us," Constable Neil Davies said.
The island's permanent population is just 18 people, its owner the National Trust for Scotland (NTS) said.
However more people would visit during the summer tourist season.
"We are very concerned that this significant piece from Canna's collection appears to have been stolen," NTS's Alan Rankin said.
"It's been an important part of the house's rich and unique collection for decades."
Claymores were used in clan and border warfare in the late medieval period and into the 17th century.
Police said similar crimes were "extremely unusual in the Small Isles".
