I suggest you look at these coins, which were released in 2013. I have been searching for a long time and it seems to me that they are suitable. I'm also preparing a list for 2014, but it will take longer than I thought. The criterion as I understood it is the announcement on the forum. At the exchange, the coin could come out next year, is that correct?
iCoin (ICN)
announcement 2013 December 29
https://bitcointalk.org/index.php?topic=389862.0new topic 2014
https://bitcointalk.org/index.php?topic=407866.0new topic 2015
https://bitcointalk.org/index.php?topic=930382.0trading on the stock exchange 2014
https://coinmarketcap.com/currencies/icoin/Sorry, no did not pay you for ICN. You bring up an interesting problem with methodology here though which is appreciated. I've said "oldest cryptos". Technically, in 2013, ICN was not yet a crypto. It'd have to be a launched coin that is live to technically exist as a crypto and not just an idea. They even called that post "Pre-ANN".
The problem this brings up though is the discrepancy between when the coin is announced and when it actually launches. Most of these old coins, the devs posted the wallet and code at the same time as their ANN thread, but often that wouldn't be exactly when the chain went live....Eventually i'd like to confirm some of these dates using github. I'd think that would be the best ultimate decider. Between github code being posted and ANN threads of Bitcointalk. Could probably clear up discrepancies. A task for later. For now i'd say the dates are probably pretty damn close and reliable. Even if code came out later than ANN, not likely more than a couple weeks later probably so pretty close.