I’m getting my head round the history of cartridge razors and could use some help from you guys on this forum. Here’s the timeline as I currently understand it: 1970: First cartridge - Wilkinson Bonded Blade 1971: First twin blade - Gillette Trac II 1976: First disposable - Gillette Good News 1977: First pivoting head - Gillette Atra 1990: First spring blades - Gillette Sensor 1993: First microfin strip - Gillette Sensor Excel 1998: First triple blade - Gillette Mach 3 2004: First four blade - Schick Quattro 2006: First five blade - Gillette Fusion 2012: First six blade - Dorco Pace 6 2014: First laterally pivoting handle - Gillette Flexball 2018: First seven blade - Dorco Classic When was the lubrastrip introduced? Was that with the Trac II Plus or the Atra Plus? And what year? And what other developments have there been? Wow - it’s nearly 50 years of carts now!