Back in the day there were several co-branded references that ran quite a long time. Tiffany is the one most think about, but another was SERPICO Y LAINO.
I want to say it was the mid to late 80s when Rolex informed Tiffany they would no longer co-brand, but I'm not sure.
Indeed depending on the reference the co-brand can add to the value of the watch however with Tiffany paper work is critical.
Unlike other co-brands that put their mark somewhere on the watch, Tiffany appears only on the dial and paperwork. As these are some of the most faked pieces in the world of vintage (adding the name) many collectors will view valuation as standard for the reference (or even a bit less if a dial has to be sourced).
Adding to the quandry seems to be no consistency in the font used from reference to reference. (Though of course those that seek these pieces are astute indeed in what's what).
The myth is that Tiffany and Rolex had a disagreement when it seems Rolex simply informed Tiffany they would no longer cobrand.
