Ullaging barrel rule scale by T.O. Blake, C 1890
A set of 6 English ullaging round rods Barrel rule scale or ruller by T.O. Blake (sikes’ hydrometer) Ltd. The buxwood rods fittings well by a brass screw mechanisme. The rods have two scales, in thumbs and goes to 60 and litres goes to 400Full extention 160 cm long.