Yes, I noticed that an electric primer had been fitted, but forgot to state that in my reply. If the case had been loaded with black powder, it should have the letter "P" with a punch mark after it stamped on the case. (Out of about 20 2-pdr cases I have, only one is stamped with a P rather than the usual CF!)
Some of my cases also have primers dated much later than the date on the case itself, but they are usually the ones that have been shortened to be used in the sub-calibre HA guns.
Siegfeid, what is the length of your case, please? From your photo, it looks as if the mouth has been belled out, so any legth you quote should be the "pre-belling" one.
Regards,
Roger.