ARTILLERY SURVEYORS SIGHTING & POSITIONING RULE boxwood with oxidised bronze folding sight fittings. Boxwood body stamped ‘F.B.& S. (1932) Ltd. London’. Scale one side 22 = 1 mile’ one side, ‘Inches & 50th’s’ the other. Rule in particularly nice condition complete in leather scabbard. Scabbard stitching has perished in many places, but leather is sound.