Hello Harry,
I have researched 1 & 4./(F)123 extensively since 1996, if you visit our website;
www.aircrewremembrancesociety.com and go to the loss page for Luftwaffe you will find some information and photos relating to various losses of 1 and 4.(F)123. I hope you find something of interest.
Kind regards,
Melvin
Luftwaffe researcher
(Aircrew Remembrance Society)