Wanted one of these for steaks, and found one, unused for $35. Most of them I see are smaller, but this one is about 13x10, not including the handle. Not sure if that was a good price or not, but as much as we cook steaks, it was worth it to me. Just unsure about how long ago these were made, as I don't see them still for sale. Any ideas? And what does the "JSO" designation mean? Thanks, in advance!