I am going through some of my Washington Quarters and found this one with many die cracks OBV and REV. And, I feel that it is RPM-001 as on Variety Vista.
I'm thinking it's a bit of MD. Die cracks look like a mix of 001 and 002. I'm thinking that these are classic failure points on the quarter design, but I'm not that familiar with the Washington series.
Yes, it is tough to find a Silver Washington that doesn't have these die cracks. I am about to post a 1957 P with some serious cracks on the Rev.