[Doolittle81]

Larry, here are some photos posted at the flight Sim forum in a thread about 110 markings during BofB. There is agreement that the balkenkreuzen would have had the wide white border/trim, generally as you also said...with documented/photographs showing exceptions. (These are not II./ZG76 aircraft which was my original focus):

Bf 110 [/b]3M+AA ZG 2flown by Oblt.Wilhem Schaefer shot down on September 4th 1940.





Bf 110 C-1 U8+HL W. nr. 1372 ZG 26 crewed by Fw. Hermann Brinkmann and uffz. Erwin Grüschow shot down on September 11th 1940.

Note the I. Gruppe white nose and rear fuselage band applied in the latter stage of the Battle of Britain.





On the Russian theatre, this Bf 110 E S9+AH, 1./SKG 210 (SchnellKampfGeschwader 210)
of Oblt Wolfgang Schenk has been seen at Seschtchinskaya in september 1941 wearing these "early style Balkenkreuz".