Help ID 2 Pence Edward With 'Cardiff Corporation' Overprint?

I've done some research online but can't seem to find where this comes from. Obviously GB but I can't find a Scott #. The closest clue I've had is that Cardiff Corporation is some kind of transportation company in England, perhaps government owned, so they may have had their own internal postage?

Cardiff Corporation was the Cardiff local council. They would have run buses, schools, parks, libraries museums and any number of other local services. In the days before meter mail they would have had to use vast numbers of stamps for their daily correspondence. They were normal stamps, purchased from the post office. Before they handed them over to their workers to stick on letters they overprinted them to stop workers from pocketing them and using or selling them for private correspondence - the post office would only accept these overprinted stamps if they were handed over en masse from a council official. It is very like the perfin system used by many councils and commercial companies. Bristol Corporation did the same, and no doubt many others.

Very cool, thanks!

And, by the way, that's George V not Edward VII.

George is the one with hair. Edward was hair challenged.

You can find lots of information online (including here) if you search for "commercial overprint". The best resource I've found is the Commercial Overprint Society of Great Britain, at

http://www.cosgb.org/

Their listings show that yours is the first of four different overprints used over time for Cardiff Corporation.

I believe these were generally used on receipts, perhaps in this example when you paid your electric bill? The 2d tax was eliminated in 1971.

Thanks! Noted on the G-man vs Ed distinction. You guys are a wealth of knowledge. Last time I was into stamp collecting I had to drive to a dealer and ask, and he might know or might not. This is way better :)