Tesla Motors Club

I have an S70 built 11/2015 and I know it has a true 70KWH battery. Helping a buddy find a good used Model S and I came across a 70D for sale that was built in March 2016 just before the new body style and 75D cars were announced. I think I recall reading that the battery was ready before the new body style so a few lucky buyers of the old nosed S70 and S70D ended up with 75Kwh batteries. This article kinda’ confirms this but it’s a May article speaking specifically to the new nosed S70 and S70D’s. Can anyone confirm if the March 70D is really a unicorn with a 75 in it and can these be confirmed somehow when inspecting the vehicle?
Tesla Model S 70 Is Really a Model S 75 You Can Upgrade After Purchase