Operating Instructions Type 1521-B Graphic Level Recorder

Operating Instructions Type 1521-B Graphic Level Recorder written & published by General Radio Co, West Concord, MA, 1964. 1st Edition. Paperback. Size 4to (up to 12'' tall). Condition: Good. Liquid stain throughout book, top spine edge approximately 2X2 overall content OK, pull out schematic top edge chipped. 40 Pgs. Manual illustrated with drawings and black and white photographs. Description text copyright 2007 BooksForComfort. Item ID 15535.