Well I was going to send this to Don but the personal message thing isn't working for me. But some of you will like this anyway.
Don, I found this several weeks ago and thought you might get a kick out of seeing it. (Unless you already have seen one - which is certainly possible).
Barcalo with "SECONDS" stamp.
The SECONDS cause looks to me to be the roughness of the back side.
I am trying a second time to collect another nice set of these. I'll have to be more careful - I didn't see the seconds stamp til I got home, and another one I bought had grind marks. Lucky they were real cheap (way less than a buck).
Al