Here is my understanding of some various warranties, please let me know if I'm wrong or missing some:
Nikon Premier series, 25 year no-fault warranty. I don't know if it transferable.
Leica Trinovid and Ultravid BR, lifetime no-fault Passport warranty, not transferable, and you have to register your warranty card within 30 days of purchase.
New Leica HDs seem to be in flux, there was talk of a time limit due to EU regulations, but Leica seemed to have backed out of that after a customer revolt. I don't know what the official policy is, but the new guy Terry Moore seems to be concerned in improving Leica's bad customer service reputation.
Swaro in North America, very liberal policy in practice. They seem to fix anything, quickly and at no charge regardless of their written warranty or who owns the bin at the time. I don't know about Swaro in Europe.
Zeiss? I don't know their warranty policy. I am interested in finding a pair of used Dialyct Classics and wonder if they are not up to snuff, are they covered by warranty for a new owner?
Vortex, very generous lifetime warranty.
Others?
"If any Leupold Golden RingŪ product is found to have defects in materials or workmanship, we will, at our option, repair or replace it. FREE. Even if you are not the original owner. No warranty card is required. No time limit applies."
The warranty on the green ring stuff is pretty good, too.
Zeiss sport optics have a lifetime transferable warranty in North America. Provided it was registered (proving it was not grey market), the optic is covered in perpetuity. How far back this goes into older optics, I don't know, though it should apply to ClassiCs that were sold recently.
FWIW, I've owned the 7x42 classics and I'd rather have the FLs in the same format. Lighter, an inch shorter, twist up eyecups, better color correction and truly waterproof, and the same field of view.
Selsi had a 1 year warranty.