Feldpost help

[HuD]

Morning guys,
just got an interesting helmet that has a name and feldpost nummer written on the leather.
Had a search on the usual fp site but no success, so here i am asking for some more expert advice about it.
The feldpost nummer is not clearly readable but i guess it should be something like that: "03229" or eventually "O 3229".
Can anyone help me with this number?
Many thanks,
Stefano

[hucks216]

03229 -

(28.4.1940-14.9.1940) Kolonne Infanterie-Regiment 553, u. gestrichen,
(15.9.1940-31.1.1941) 2. Batterie Reserve-Flak-Abteilung 123,
(15.9.1940-31.1.1941) 2. Batterie Flak-Regiment 42,
(7.11.1944-Kriegsende) 19.1.1945 2. Batterie Flak-Regiment 40 (Sf.).

[HuD]

Thanks so much for the info.

Best,
Stefano