Handstamp seen on stamps apparently used in BENDER ABBAS, 

This handstamp also found on remainders of the 50Krans stamps.

The status of this handstamp is questionable, although it seems to have been legitimate.

10 Tomans block of 4 with Type 3 handstamps and 4 digits number in violet ink.

10 Tomans with Type 3 handstamps & 4 digits serial numbers in red to violet ink.

20 Tomans with Type 3 handstamps & 4 digits serial numbers in red to violet ink.

25 Tomans with Type 3 handstamps & 4 digits serial numbers in red ink.

50 Tomans with Type 3 handstamps & 4 digits serial numbers in violet ink.

100 Tomans with Type 3 handstamps & 4 digits serial numbers in violet ink.

Various digits used in these serial numbers

Whether these handstamps applied in Teheran or else where and how legitimate they are, it is not known