[quote]
In digging out my copy of "Fairbairn's Book of Crests of the Families of Great Britain and Ireland,...
[unquote]
What edition of 'Fairbairn's Crests ...' are you using? My hardbound copy (1977) only has 144 plates.

[quote]
I see there are some similar elements for your ring on the following plates ...
[unquote]
Unfortunately, that observation is of no assistance as crests are a very personal item and do not follow family traditions. Where does one draw the line on "... similar elements ..."? Containing: vested arms; something between two wings; hand holding some flora; sprigs of oak leaves; or containing one or more Cross crosslet fitchee?

The vested arm is positioned between two demi-vol.
The crosses on each of the wings are Cross crosslet fitchee.
The [sinister] hand appears to be holding a sprig of three oak leaves.