Dear Krishnaprasad,
1) You can see the usage of the Sama veda accents and marks in the omkArasAmaH manuscript in the "The Vedic Manuscript Collections of the Joglekar, Kodlekere and Samba Diksita families of Gokarna" collection of the Muktabodha digital library.
The direct link to the manuscript is:
username: vedic password: Vedic123
2) candrabindu over virama (ABF3) and double candrabindu over virama (ABF4) can be seen in Sastri and Rangacharya's edition ot the Taittiriya samhita.. (I don't have my library with me so I can't send you examples of this but I suspect this edition is in
archive.org .
3) double svarita 1CDA . I haven't seen this in printed editions of the taittiriya samhita (such as Sastri and Rangacharya's edition mentioned above) but I've seen this in some chanting books of the Rudram .
4) triple svarita 1CDB . So any information about this accent from list members would be appreciated.
Regards,