Available in the US since 1970 (when TMOQ copied the original East Coast release for the first time and brought it to the masses). It would later get copied again in Japan twice as part of the JL-xxx series as JL-521 and 1003.
A rare one, I doubt it ever came up for auction in the West. It seems that OG abandoned their idea of a printed cover, as it had used for their very first release # 504 and simply went with all white covers from here on.
“Blank white jacket. Label in black and silver with title and record number (OG-506).”