I had a gut feeling that both blades on this two auctions were twist-cores.
They both arrived the same day early last week. The photos were too large to upload so linked the photos on my photo bucket.
http://www.ebay.com/itm/Antique-Moro...nc#ht_40wt_888
http://www.ebay.com/itm/121193139865...1#ht_108wt_680
http://s811.photobucket.com/user/ccu...30b8f.jpg.html