Egyptian Silver Platter

[llane]

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I have a 12 inch square platter that I am trying to identify. On the back of the platter there are 2 sets of marks. The marks in the middle of the pattern show that the platter is Egyptian.

http://tinypic.com/view.php?pic=35ckax1&s=6" onclick="window.open(this.href);return false;

The marks are (I believe)
1. Cairo 900
2. Egypt after 1946
3. 1965-1967

On the edge of the platter are 2 more marks
1. HF in a Diamond - I've looked through the pages and can't find this mark.
2. 900

My question is 2 parts.
1. Am I right about the Egyptian marks?
2. What does the HF mark mean?

[Noble Metals]

Hi llane, I believe you are correct about the Egyptian marks; the other marks likely denote the purity for the importing country and the assay office; sorry I can't tell you what country although someone on this forum may be able to. Look through the sections on countries that have separate marks for assay offices. Good luck!