Love it TP1.

That would be a CIG (Commonwealth Industrial Gases) product to supliment their Satin craft line of electrodes. Ha ha

By the way they are first class rods (satin craft) but attract moisture easily.
To pass xray, this is what should be used on galvanized pipe. Even when the galv is removed there is still some contamination within the weld with the zinc fumes creating hydrogen gas. The flux on these rods minimizes this.
End of lesson................
By the way isn't that photo of "Spectum" a ripper? What a work of art.