Once upon a time, I think, there was a concept of a "matched pair" of skis. The idea was predicated on the understanding that - at least at one time - skis coming out of the same mold could have different characteristics, depending on construction factors too subtle to control easily with available skill and technology. Typically a "matched pair" had close to identical stiffness, flex pattern, camber, dye lots, etc. The two skis comprising this pair received matching serial numbers. I'm pretty sure this kind of thing still receives attention in the world of nordic skiing.
Am I making this history up? If not, is any of it still applicable in today's world? If I have a brand new, late model unmounted pair of skis with serial numbers that don't match (and flexes that - subjectively - don't match either), does that mean I don't actually have a pair, or does it just mean that this particular factory gives a unique serial number to each ski, and that I am likely over-analyzing? Do the facts about this vary from brand to brand, or even from model to model?
What practices do retailers apply in this area? For example, if a retailer receives six pairs of a particular model in a given length, are they received from the manufacturer as designated pairs? If so, does the shop then take pains to keep the designated pairs together?
What about warranty concerns? I would imagine that the integrity of a ski (or lack thereof) is completely independent of who its mate is, and that therefore there would be no warranty implications to having a mis-matched "pair" (although there might be performance implications).
Thanks in advance.