Zippo pat 2517191method for distinguishing true from false

/f？ Kz=536036855 This is from the master of Baidu ZIPPO Post Bar. Please compare carefully. If it's not enough, you can post a picture and ask the master. But the picture should be clear, and there are undercuts, hinges, steam wheels, shrapnel, liners, cotton pads, flints and so on. I hope my answer can help you.