In case you may not know about this site, check it out.
https://images.search.yahoo.com/yhs/...m_appfocus1_cr
I have a D-12.
http://disstonianinstitute.com/12page.html
I also have a 26" Disston 8tpi with a nib. The sawnut is silver colored.
It has four saw nuts,
I also have a Disston panel saw with a nib. It is a four sawnut handle.