Very nice. I slabbed and sold a large date in about that same condition a couple of years ago, and got only $30 for it. Yours looks to be a small date and more attractive to my eye. You might be better off not doing what I did!
I think the 53, 56 and 60 D/D are the three best "parallel D/D" in the entire series, or any US series for that matter. You could make a career out of running down all of the identified RPMs for 1960. Personally, I think only 6 or so are worthwhile, but that's me. It's certainly a rare find in 2021, but, as someone mentioned above, not worth the cost of certification, at lease from a financial standpoint. It's a large date.
