Not as rare as I thought it might be when I acquired one. Don't remember when they sold them, but seems like it was 40's or 50's. One sold at vern Nail auction for $ 12.50 so they are not real pricey. Thought I posted mine on Tool Talk when I got it and someone had a cat and gave me dates of sale but if so I didn't add it to wrench tag and didn't find it with search on forum so info was lost. Some people are hard to help.