Underground Comix are known for using different prices, covers (art or color variations) and interior content to distinguish different printings.
1st print November 1972 has 0.50 USD cover price and says 54321 on inside front cover.
2nd print September 1977 has 1.00 USD cover price and says 543 on inside front cover. (with new cover and different content).
3rd print April 1978 has 1.00 USD cover price.
Inside front cover with illustration and indicia information at bottom of page.
On back cover.