Those look great. I'm dyin to know how you keep them so nice and clean, inside and out, and free of grit...
sse, It's not too hard. I basically follow Pan Man's recommendations, with a couple wrinkles of my own. I use bacon grease to season them and I also use copper scrubbies and a little mild dish soap with very little water to clean. If anything is caked on, I use a spoon as gently as possible to scrape it out. Then I pat them dry and ALWAYS re-season with bacon grease.
I was also very selective when I bought them. So, I wasn't dealing with crap to start with.
Word of caution: DO NOT buy from the "collector", "collectibles" websites. Their prices are ridiculously inflated. I've also found it not to a good idea to waste a lot of time chasing anything out of Kalifornussia. Owners there seem to think their pieces are gold encrusted.
If you're patient, you can find everything you need at a good price using ebay or craigslist. Here are a few examples of that.
http://www.ebay.com/itm/VINTAGE-GRI..._DefaultDomain_0&hash=item2a4468dbachttp://www.ebay.com/itm/Griswold-7-..._DefaultDomain_0&hash=item4d24b16a20http://www.ebay.com/itm/Griswold-6-..._DefaultDomain_0&hash=item4d2494e8a9http://www.ebay.com/itm/9-Griswold-..._DefaultDomain_0&hash=item58b585f1c0Pan Man info:
http://www.panman.com/http://www.panman.com/cleaning.htmlhttp://www.panman.com/booksforsale.htmlhttp://www.griswoldfamily.org/griswold_things.htm