Greg Barron wall plate

Great reading about Greg Barron, and after seeing the mark looked at this big plate that we have. Yippee. Can someone put an approximate date on it please.

I only know this mark and his mark that he puts on his big pieces and Greg seems to have used these right through his potting career.  Perhaps you should contact him and ask if he can give a time frame as he makes himself available to contact.
I don't know why he doesn't have his own category?
I will fix that right away as he is well deserving of one.