Accession number: 2018.0.388
Date: 1925 – 1939
Measurements: 4.9 cm L x 8.9 cm W
Military Unit: 1st Halifax Coast Brigade
Narrative: Documents from the office of Major O.R. Crowell, Director of the Halifax Civil Defence Force during the Second World War.
Description: A small, rectangular ruler for maps, scale 1/20,000 with instructions on use imprinted on the ruler.