Luck, I guess.  I remember visiting an antiqur place on I-30 about 30 years ago that had a whole room of them.  I commented about how useless they were.  Hindsight sometimes gets ya doesn't it?  I got the spiders before my regular ovens, the first in an old store in Van Buren,  the other two in Springdale in an old store turned into an antique shop.  They are 10, 11, and 12 inchers.  I used the big one a lot until I got tired of trying to move it by the handle.  The loop on top of all of them is quite a bit taller than the newer ones so they don't stack well.