How much would a 1950's zippo be worth with pat 2517191 pat pend?

The value of a 1950s Zippo lighter with the patent number 2517191 (patent pending) can vary based on its condition, rarity, and demand among collectors. Generally, lighters from this era can range from $20 to several hundred dollars. If the lighter is in Excellent condition and retains its original finish, it may fetch a higher price. For a precise valuation, consulting a collector's guide or an appraisal expert is recommended.