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| HERE 'C' DENOTES WEST BENGAL CIRCLE OTHER CANCELLATION : 24 NORTH PARGANAS 13.01.12 |
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| TEMPORARY P.O. : C - 808, 05.09.1960 |
An Experimental Post Office was a temporary post office with all postal facilities like a normal permanent post office, opened primarily to make an assessment to determine the financial feasibility to establish and run a permanent post office at that place.
The Experimental POs were often shifted to new locations or closed down or in some instances, made permanent.
All Experimental POs were allotted an alphanumerical number begining with the Circle initial followed by the number of the PO. The use of alphanumeric characters to denote the locations of Experimental POs was first mentioned in Post Office Circular No. 40 dt. July 16,1883 issued by Frederick Rogers Hogg, Director General of Post Offices in India but, no subsequent circulars ever described the numbers corroborating the locations of Experimental POs.
Experimental POs were provided the following datestamps and cachets.
1. Regular Datestamp with Exp. PO No.
2. Registration Datestamp
3. Parcel Datestamp
4. Money Order datestamp
5. Savings Bank datestamp
6. Post Office Name Stamp (oblong)
Source : Joy Daschaudhuri
https://www.stampcommunity.org/topic.asp?TOPIC_ID=66564
