Gutman Distributing was the first distributor for the USA. They developed a guide for the collecting community for knives which they sold to dealers. The following charts are meant as a guideline. In most cases, the charts represent what years Gutman imported these knives in their business. These knives may have been produced before and /or after after the Guide produced by Gutman. One example of this is the Trapper’s Companion. The chart only shows the the knife was imported only 1 year. As you may know the Trapper’s Companion was produced before 1972 as shown on the chart.
Here are the Guides: