U-181 Manufacturer or Marking No Name (Fred Locke) (USA)
Size: 60mm X 104mm (2 ⅜ x 4 ⅛) Example in Photo: No Name (Fred Locke) (USA) Photo Credit: Elton Gish Digitally repaired by: Shaun Kotlarsky Patent:726,846 - Patented May 5, 1903
To directly link to this image copy and paste below URL:
U-182A/B Manufacturer or Marking No Name (Roberts patent) (USA) MACY INSULATOR MACY IND (Square D) (USA)
NOTE: in 2008 and older reference books, there was a U-124A/B listed. It is Identical to the U-182A/B so is now part of the U-182A/B listing.