Feldpostamt Numbers?

[landsknechte]

I'm trying to track down the units associated with the following Feldpostamt numbers:

421 on 31.12.42
435 on 14.12.43
720 on 22.3.44

Thanks,
--Chris

[Jonathan M]

Chris

If you're looking for the FPN we'll need the 5 digits

Jonathan

[landsknechte]

I only have the three digit FpA from the cancellation stamp, I'm afraid.