Thieves broke into the Far North District Council offices in Kaikohe on Wednesday, targeting the antique gum cabinet in the main foyer.
Both the cabinet and its contents were donated to the Kaikohe Borough Council, and were inherited by the district council, by Frank Dickeson (1886-1975) in the 1970s.
The gum was part of his family collection. Dickeson's General Store, which traded the commodity, was one of the first businesses to be established in Kaikohe.
Council staff were unsure where the gum had come from, but it is believed to be local.