Before releasing the original Bitcoin client(which Bitcoin Core is a descendant of) on 9 January 2009, Satoshis shared an earlier 2008 version. One thing that was different in this version was how many sats is 1 Bitcoin. Check for yourself 2008: https://github.com/benjiqq/bitcoinArchive/blob/master/nov08/main.h 2009: https://github.com/benjiqq/bitcoinArchive/blob/master/bitcoin0.1/src/main.h