Mis-draws

07:54 Sep 22, 2018 

Haha. In China we say, there are all kinds of birds in a big forest.

07:31 Sep 22, 2018 

Pardon me for going off topic, but there's a Spanish expression that comes to mind here: hay gente pa' to', literally "there are people for everything": i.e., it takes all sorts. It's attributed to the bullfighter 'El Gallo', from Seville (hence the Andalusian pronunciation of para todos as pa' to'), who was introduced to the Spanish philosopher José Ortega y Gasset at a bullfight. On being told Ortega was a philosopher, El Gallo asked what a philosopher was, and was told it was someone who worked on ideas and thought. The bullfighter replied: "hay gente pa' to'".

07:23 Sep 22, 2018 

Yes. It refers to all kinds of pins. Actually, Terry Pratchett was making fun of fanciers generally.
I think I get the picture after reading your and Charles' answers.

07:11 Sep 22, 2018 

I agree entirely with your second post here, and if you open the link updownK provided in the question you can see the context, which bears out this interpretation in my opinion. Just for the record, I had already posted an answer making these points. Not that I mind in the least, but I wanted to make it clear because people can be quite censorious about posting answers that plagiarise previous discussion posts.

06:49 Sep 22, 2018 

OK, I've just seen your other question, and Phil's answer — so if indeed these are sewing-type pins, then they are made from drawn wire, and hence I suppose 'mis-draw' could refer to where the original wire was badly drawn (= made) — du to the way wire is drawn through a die, it would be hard to imagine that the wire might be fatter at any point — but it is conceibvable, for example, that it could be abnormally thin in some places, for example. Or in some other way damaged: scored, wrinkled, etc. I think the key point is that someone has gone to all the trouble of writing a whole book about a very occasional and minor manufacturing error, showing the kind of almost obsessive attention to detail you often find among people with extremely narrow but very deep knowledge of one particular subject.

06:43 Sep 22, 2018 

First of all, what kind of 'pins' are involved here? Is it talking about pin badges?

If so, 'mis-draw' might be ones where there is an error in the drawing — assuming, I suppose, these are perhaps hand-made badges? Or have been printed with an error!
Otheriwse, 'mis-draw' might indicate something that has been incorrectly 'draw'n (say, from stock) — this might apply in a warehousing / order-picking context, but I can't see how that could have anything to do with the apparent context here?