Found it : Auction 137, 3/6/12, Lot 478. Sold for £600. The diagnostic feature of the genuinely small date is a die crack running up through the 5 of the date.
Think this is the only one sold by London Coins - as I say, their other ones are mistakenly called this small date when they are not. I have a low grade one also with the die crack and think I have seen a picture somewhere on this forum (where??) of another. Any more known by anyone?
I spent this morning looking through all my pictures of 1858 pennies sold on ebay in the 5 year period between September 2006 and September 2011. I have been gradually trying to do stats on some of the easier dates but thought in light of the discussion on 1858 Large Rose pennies I would try to come up with something useful for that particular variety. This meant trawling through nearly 5000 images of around 2400 coins.
I think that the numbers below will be fairly representative of 1858 Large Roses as a percentage of the entire 1858 population, because in the period 2006-2011 it was only known about by a handful of collectors, prior to the LCA 2012 piece which was only in Fine grade and fetched £600.
From the 2400'ish 1858's listed on ebay in these 5 years, there were 13 Large Roses, 6 Small Dates and 7 Large Dates.
Two interesting things I also noted were:-
1) The very first one in my study was listed in late 2006. It was an ok grade but was re-listed again a week later because it didn't sell.
2) The second one, which sold around mid-2007, I was surprisingly outbid on at the last minute. This was when we could still see the ebay ID's of other bidders, so it sparked off a discussion between me and John S. about who the bidder called Rashenley actually was.........but I guess that's a secret!
I think that the 1858 LR's are one of my favourite varieties in the YH penny series, and have perhaps become a little under-rated since 2012.
Like John, I spent quite a time getting my first decent specimen. The 2012 LCA sale prompted collectors to search their own collections to see if they already had one; this resulted in a few more seen at subsequent LCA auctions, several of which I think have been 'doing the rounds' without actually increasing the overall population.