Moving-iron a.c. recording voltmeter no.71159 Moving-iron a.c. recording voltmeter no.71159 Moving-iron a.c. recording voltmeter no.71159, made in England by Elliott Bros (London) Ltd, speed 1 inch per hour, range 180V to 260V(lacks pen) Object Number: 1992-506 Pt2 type: voltmeter - moving iron