A. H. Grebe & Co. 671-B Pwr. Unit Get a print! $8.00 Add to Cart Product Information: Model:671-B Pwr. Unit Manufacturer:A. H. Grebe & Co. Schematic Pages Page 1 Schematics Content Page 1: Grebe Synchrophase Seven Grebe "B" and "C" socket power Type 671-B Please note: we carry a wide range of products which will fulfill the specifications above. Please use our search function or browse our products to find what you need!