Help with mintmark on 1942 D quarter

When going through some BU quarters i found this mintmark. What is going on with the mintmark? Is it an RPM, die chip, or what?
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It is hard to say from photo supplied. Do not use screen shots, they are too
pixilated to see detail clearly. Download to computer and repost so that we
can you better.
I was trying to look on Variety Vista to check the mint mark styles used, many times it will show ones with chips in the punch.
I can't get Variety Vista to come up on my computer, it says the website is down.
Sorry I can't be of more help, try checking VV website and see if the site works for you.
Thanks for the info! Appears to be D/D South RPM #3