James Millen Mfg. 90651 Grid-Dip Meter Instruction Manual $8.99 James Millen Mfg. 90651 Grid-Dip Meter Instruction Manual quantity Add to cart Category: James Millen Description Description For sale is reprint of James Millen Mfg. 90651 Grid-Dip Meter Manual. Manual is 11 Pages long, Dated 1949. Manual consists of 6 pages of instructions, 3 pages of schematics and 2 calibration charts.