Hello again everyone and thanks for your comments.
rebelreenactor - I'll be painting the wheels and tracks very, very carefully. He, he! Seriously, I've gotten pretty good at getting in there with a 20/0 or 12/0 detail brush without too much difficulty.
tigerman - The schurzen are provided in the kit as clear plastic. Pretty nice, too.
J.S. - Normally I will paint a tank in subassemblies, but with this kit I've decided to basically complete the assembly before painting. It this case the individual track links and just the way the kit builds up dictated that this would probably be the easiest way to go. Now for your question:
Your Flakpanzer belongs to the Panzer Grenadier Division "Grossdeutschland" (as Kenneth said, indicated by the white helmet). However, I haven't been able to locate any information that would give me an indication of a date other than common knowledge.
Grossdeutschland fought nearly the entire war on the Eastern Front and many units on this front employed a three color camo scheme from 1943 through 1944. However, from late 1944 onward, many units abandoned this scheme as supplies dwindled. Since the 105 Wirblewinds were produced from May - Nov 1944, this would support the paint scheme.
Since Wirblewind deployment was gererally limited to the major Panzer Grenadier Divisions and the SS Panzer Divisions, you could build this kit as being assigned to any of these units from June 1944 onwards.
I hope some of this helps.
Enjoy your modeling...