Interesting lighters. The first three appear to be copies of the Ronson lighters so popular in the U. S. in the 50's and 60's. IIRC, the other popular maker was Evans but not nearly so popular as the Ronsons. A lot of lighters were made in Austria, I have one now, a copy of the old trench lighters of WW1. I fire it up once in a while but not often, as the BIC lighters are so much easier to use and no maintenence. The fourth lighter may also be a copy of a later Ronson, does it use lighter fluid or propane?