I had to call Tiger Tools customer service on these. From the 1980s into the 90s when they marked them Mark 2 now 10104 and Mark 3 now 10105. The 2 smaller ones were not marked except for the pat. # and made in Canada. They were used maybe once, in excellent condition, please review picture's carefully. 100% guaranteed. This set is very rare, they don't even sell sets of 4 anymore. Feel free to contact me with any questions or more pics.