Zeno Pepsin Chewing Gum 2 Sticks With Wrappers 1915-1920. Here are 2 vintage sticks of Zeno Pepsin Chewing Gum plus the outer wrappers. These are over 100 years old. The sticks and the wrappers are in remarkable condition for their age. The gum came in wax paper. The wrappers are not torn nor is the outer wrapper. The gum is not broken. These are around 1915 to 1920. Zeno had just sold the company to Wrigley's but, I presume the sale wasn't quite finalized because Zeno Mfg Co, Chicago is still on the back with WM Wrigley Jr successor on the back as well. These are very very rare to find in any condition. Please check out my other vintage chewing gum. Please check out my other vintage chewing gum offerings. Check out my vintage toy collection and advertising. Please ask any questions that you may have. Thank you, Dave