Best Glide ASE Compact Tracker II Button Compass U.S. Military / Government NSN # 6605-99-127-9239; and is NATO approved. It definitely points North  GUARANTEED! Newly Improved Version! Don't confuse with counterfeits & knock-offs - This isn't made in China. 20 MM or 14 MM in Diameter, so fits in almost any survival kit, pocket, purse, etc. Oil Filled and Pressurized for needle dampening; Water Resistant to 100 Meters; and Glow in the Dark Cardinal Points.