Need Help for authentification of serial engraving

[eugeneglen]

Hi Collectors,

I am writing to ask for your options, advise and hopefully knowledgeable sharing in this post. What I did was compounding 4 pieces of the Rolex 70s 1680 red sub 2m serial and I noticed there is some variation on the engraving of the number 2. May I get your advise which is any one from picture shown is not authentic to you. Thanks in advance!

Picture link: https://imgur.com/gallery/nmXDR0y