Vintage Zircalloy Department of Defence Imperial Open End Spanner
Vintage Zircalloy Department of Defence open end spanner. Stamped with Broad Arrow D↑D. The use of the name Zircalloy implies an alloy of Zirconium was used. This is a rare and expensive metal, which imparts specific properties, and its use would only have been feasible under military contract. We're not tool specialists but we believe the spanner may have been made at the Lithgow Small Arms Factory in New South Wales and that it was made post WWII. It's clear that one end is stamped 1". The