As with production knives made today, I think the answer is, 'some were perfect, some nearly perfect, some were good, others not-so-much'; for exactly the same reason (built by imperfect human hands). I've thought about this a lot, and there are some stellar examples of the older knives to be held up as examples of how much 'better' the old ones supposedly were. I'd be willing to bet most of the perfect older knives we see posted here today, were no more the 'norm' than the perfectly-executed modern ones we occasionally see nowadays. A lot of us 'collectors' (read: obsessive perfectionists) go specifically looking for the 'best' examples we can find of the vintage knives, pretty much ruling out all the other 'less-than-perfect' knives of similar vintage that are found everywhere, but don't get noticed by collectors, because they're just 'average' or 'typical'. I myself have quickly dismissed a lot of older, but essentially mint, knives on the 'auction site', because it had that one particular 'flaw', like a warped blade (not centered), or wobbly blades & weak springs, or unevenly-matched stag scales, or cracks in the scales, or whatever else. I think, as with many today, the 'less-than-perfect' ones probably got used, and used hard, for a long time. And, some of the 'perfect' ones were noticed as such, and carefully set aside for us to enjoy at a later time.