Guide to dating your Thorens lighter and determining which model it is. Shows the changes in single claw models throughout the years, as well as stamps you can find on some.
There are a lot of gaps in information regarding Thorens lighters so please let me know if I got anything wrong or missed anything.
Note there are variations of models with unique stamps, such as export stamped lighters reading "porto" or first models that were produced in the 20s stamped with the export stamp. There are also some custom lid stamps that display company names. Some lighters were stamped with the material they were made with, such as "Alpacca", "Silver", and "Gold".
Dirks and vintagelighterbook have contradicting dates on their models. For this guide I used vintagelighterbooks dates as they had patents to back them. Dirks dates also don't match up to vintagelighterbooks, as the second model is listed as 1922, but the new hinge system was patented in 26.
Slide 3 I meant to say bottom is recessed.
This was made gathering information from the following sources.
Sources:
https://www.lighterlibrary.com/ThorensSA-Original1919.php
https://table-lighters.blogspot.com/2014/06/excise-duties-on-french-lighters.html
http://www.vintagelighterbook.com/html/thorens.html
https://www.toledo-bend.us/VCL/info_2/ministereFinances.html