Another informant has responded:

>As far as I can see, the situation for cyrillic is quite
>straightforward: a book printed in civil script will use arabic
>numerals (and indeed roman numerals as the occasion
>arises), while a book printed in Church Slavonic script will
>use cyrillic numerals -- irrespective of the date of printing.
>
>As for glagolitic, in my experience glagolitic scribes and
>printers use glagolitic numerals, but my experience doesn't
>extend beyond the end of the seventeenth century. I don't
>know what happens after that, but I expect you could find
>someone who does at the Staroslavenski zavod in Zagreb:
>http://jagor.srce.hr/staroslavenski-institut/

--
Michael Everson * * Everson Typography * * http://www.evertype.com