I just installed some that have springs on both sides, and lips on both sides: 2 lips on one side and 1 lip on the other (3-lip seals!). With no instructions, either!
I installed them "long side down" as it appears the the backside (pressure side) of the 2-lipped side of the seal has lips pointing downward, while the other (now upper) side also has the same arrangement. I'm supposing, with these, that the upper side's lip is intended to scrape off bugs and dust above the seal. In other seals I've seen before (up to 4-lipped types) the lips all pointed one direction (and had one spring on them), intending to scrape oil from the up-moving tube and keep it in the fork's lower leg. These new ones appear to intend to scrape of dust & such as the fork plunges on jounce, then use the lower 2 scrapers to retain the oil below. There is a thin web in between these 2 lips, too, which lets the fork's (non) concentric position wander a bit while still retaining the seal(s).
In the late 1980s, Honda [briefly] introduced some 4-lip seals for the post-1972 style forks for the 750 in an effort to dry up those often-weeping fork tubes. The 4 lips added so much stiction to the tubes, though, that you had to run over a brick at 30+ MPH to make the forks compress! Those only lasted 2 summers before the 3-lip style returned, but those didn't 'float' their center seal like many modern ones do now. That 'float' allows for fork tube bending on larger bumps while still retaining a decent seal on teh tube.
