I didn't look for this error until I saw it at Ken Potters site. Lo and behold I think I found one. I'm posting the doubled one as well as 2 other 88's I have for comparison.
I don't think this one is it. The spread should be greater to the south. Can you post some clearer shots in good lighting?
I'll try for better lighting. I'm probably wrong again since it doesn't match the die markers on Ken Potter's site
Although it SHOULD match the die markers, there is always a slim chance it is either a different die state or perhaps a new die altogether. I'm leaning towards MD, but better pics will confirm. Good luck.
I can't believe this guy is posting pics and questions about his 1970 coin on my thread. No class whatsoever.