Set Square's, Celluloid, 6" 45 degree. Stores reference 13/47. Approximately 21 x 11cm (max). Engraved with King's crown Air Ministry, reference marks and 1943 date. Unissued with stores tag. Also comes with waxed paper packaging sleeve and card box having repackaging date of 1947. Just the item to complete your 'Nav' bag. Rarely found. Stock code M19021.