Parmigiani Fleurier remains one of the best kept secrets. Founded by Michel Parmigiani in 1996 with the financial backing of the Sandoz Family Foundation, the brand is one of a few that produces most components rather than outsourcing. Due to their underrated nature, they don't come up for sale on the secondary market often. These pre-owned examples often come in at a staggering value when compared to offerings from their more mass-market counterparts.