1977 Canada Pennache 1 known to exist,R8 or unique)URS-1 the 1st strike on the reverse misses to print a leaf(see last left big leaf) leaving FULL view of small maple(never seen before) normally hidden+overflip,strikes missing leaf from reverse on observe + 7 http://coinspace.org/new_auction/1977--Pennache-R8-Unique-double-extremely-error-1-known-to-exist-,name,102236,auction_id,auction_details