Many moderns do not have the notching that we have been used to in the past. Good examples are the 2014P doubled die cents. The Homestead quarter window pane doubled dies also have no such notching. Things have changed over the years.
This one resembles the WDDR 003. But I personally don't believe it to be one or a stage B, mainly because it does not have any of the other die markers as the 03.So I'm going to go with a UDDR 010.