Lew et al - here is the best I can do on the E.D.P. headstamp. At the SHOT Show circa 2004 (I don’t recall the exact year, but think it was that one), one of the representatives of Olympic Ammunition told George Kass and I that the “E” stood for Elias and that the “D” stood for Dimitri. Spelling of the two names is mine. That Gentlemen had no idea how they were spelled in English, or in the Greek alphabet before transliteration. He was not a native Greek-speaker. I recall him saying that they were the first and middle names of the owner of Olympic Ammunition, but oddly, claimed not to know the last name.
Since that time, I have gotten a second take on the meaning of the two initials - that they represent the first names of the children of the owner of Olympic Arms. I have no way to tell which is right. They could be a tribute from a “dad” to his children, of course, even though on the surface of things, the original explanation sounds more logical.
In the ECRA Bulletin number 445 of June 2002, a Mr. C. Z. Sazanidis of Greece identifies the name of the owner of Olympic Ammunition as "Basil Papadopoulas. The “P” would square with the headstamp E.D.P. Since his name seems to be Basil, despite any feeling about what would be “logical” it also lends credence to the idea that the letters “E” and “P” in the headstamp are not the owner’s initials, but rather those of someone else in the family.
Interestingly, there is a good comment by Mr. Sazanidis about another headstamp found in Olympic 9mm boxes, “N.P.A.” He says “The headstamp “NPA” stands for National Police Association, if we are to believe the explanation given by the industry’s owner Mr. Basil Papadopoulos.” In the preceding paragraph of this entry in the ECRA Bulletin 445-4, he says “The Greek headstamp comes from a cartridge loaded in Greece with components bought from abroad. In particular, the case comes from an unknown supplier other than Sellier & Bellot, whilst the powder and bullet do come from them.” (Note by JM - meaning the powder and bullets did come from Sellier & Bellot). I have heard this described as the cartridge being made completely by Sellier & Bellot, even though I doubted it. The headstamp is like that found on ammunition made in the Republic of South Africa for the National Police Association (or “Agency” - I have heard it both ways) of Taiwan, and looks little like any S&B made bunter. There is no question of the Taiwan connection, as we have a box label from the RSA rounds, as well as “NPA” headstamps from other known makers.
If Mr. Sazanidis is correct, this points to the always-existing problem of “identifying” headstamps from the components, such as primers, powder and bullets.
Note that all of the above is heresay, without any factory documentation from Olmpic on the subject, other than the information reportedly coming from the owner, as well as the information that did come from the Company’s U.S.representative at SHOT 2004(?) as mentioned above.
Also note that for what it is worth, I agree with Lew that the cases “9x19 00” and “E.D.P. 9x19” were made by the same factory, based on the near identical numbers on the two headstamps, as well as a comparison of the two cases from my own collection. that does not, however, identify WHO made the cases.