bswiv, I really have no idea...the house was built in the 50's, bought it from the builder's grand daughter...I can ask her but I doubt she will have a clue...
Is that a Isokern some other type of masonry core unit or is it a built to order in place? We're in the process of doing some work on our OLD house and one of the things getting replaced is the fireplace.
Phoneguy, thank you, I will definitely try that; I LOVE canadian bacon!
Bigim3, thanks man!