Help Me With My Italy!

I went through a box from Italy and came across a few tough ones. Any help?

I can't see two of the first four stamps well enough to be able to identify them, but the last three are parcel post stamps from San Marino, not Italy.

For values, I'd take a look at this webpage:

http://www.ibolli.it/cat/sanmarino/...m_pacchi.php

The second stamp is a postage due stamp from Italy. (These read 'Segnatasse').

Italian postage dues are listed here:

http://www.ibolli.it/cat/italia/ser...gnatasse.php

The 'Annullata' cancel (or overprint?) is interesting and not something I recall seeing before.

The third one seems to be this stamp (which you're displaying sideways):

http://www.ibolli.it/php/em-italia-9.php

Great, San Marino is good. The sideways one is my bad. Whoops, I was looking at it weird and couldn't find it! I know the second one is postage due, but wasn't sure if that was a postmark or an overprint (nullata).

Pic updated

The red overprinted stamp is listed in SG as issued in 1945, Lire 1,20 on 20c red (SG627). The original stamp was issued in 1944 by the Italian Social Republic as SG108.
The 3rd stamp was issued by Italy in 1923 for the 50th death anniversary of A. Manzoni. 50c black & brown (SG158).

rod22, the San Marino stamps are gone, inadverently, I presume.

Thanks!

Thanks again. Just one left, is that an overprint on the postage due or just part of the cancel?