
As I understand it, those higher number volumes post vol 121 or thereabouts were added to the ECRs in around 1912, and were therefore part of the index process in the 1930s, but were not allowed to be included in the filming project that included LDS and SAG.
Yes, there's many V series entries post 1856. These are basically brought about by the person attending and seeking their own Birth cert, to then be told "sorry, not available at Reg Gen's office," and then the person offers their own Baptismal certificate, and then Reg Gen requested certified info from that baptismal record. But that is only until the formalities of regulations came about post WWI.
So, in 1912, NSW BDM Reg Gen finally had some funding to get its processes in order. Then WWI saw the administrative officers enlist, or at least become base records clerks. And then post WWI, those returning clerks introduced written regulations (military processes can advantage civil processes, afterall, Gov Macquarie was the first Army governor of NSW and is credited with introducing admin general orders that give us those Early Church Records !).
So, post 1856, those V can be across the board with the denominations.
On this thread
http://www.rootschat.com/forum/index.php?topic=660501.0 there's a link to the 1856 NSW census re Religion. So, ranking in order of population:
Church of England
Roman Catholic
Presbyterian
Wesleyan (Methodists)
Other Protestants
Hebrew
Residue (JM suggests this is the "left overs" rather than a separate denomination/faith/religion)
Add
My elderly rellie (retired BDM senior officer) is on the phone as I type this up. And NSW Reg Gen (BDM and Lands Office) got their first typewriter during WWI. So, everything was longhand on pre-printed forms until then, based on oral answers to oral questions. Elderly rellie's older (now long gone) rellie was also NSW BDM senior officer, (initial employment was 'heritary' as was most of NSW Civil Service until mid 1950s .....

)
Cheers, JM