With regard to the 1838-O half dollar discussion in The E-Sylum, does anyone know where Breen got the idea that Col. Green owned seven 1838-O half dollars?

I went through the Newman appraisal when it was last offered and only found three.

I also went through the Newman portal and also found only three - 1 graded XF and two in Unc at the link below:
https://archive.org/details/colgreenestate1941newmanjohnson/page/n5

there is also a document with Newman's handwritten notes at the link below and it too only had three 1838-Os - one Proof, one Proof with slight edge dent and one in VF.
https://archive.org/details/newmanviewingnotes1940newmanjohnson/page/n33

It appears that the pedigree information for several of these is not really accurate and needs to be reassessed.

I am hoping that one day, we can get a copy of the Col Green appraisal on the Newman portal.If so, I will create summaries like I did for the Brand journals for his US rarities, patterns etc and we will get more accurate information out to the collecting fraternity.

Dave Stone of Heritage adds:

To read the earlier E-Sylum article, see:
COX 1838-O HALF DOLLAR FINDS NEW HOME(https://www.coinbooks.org/v22/esylum_v22n47a13.html)