The "Eternity" Symbol used in the Armenian and Kalash cultures.

Being of Armenian parentage, I had got used to seeing this symbol used in medieval Armenian art.

On a Khatchkar, Etchmiadzin, Republic of Armenia

Gandzasar Cathedral, Republic of Nagorno-Karabakh

Outside of a Church in the Kanaker district of Yerevan, Republic of Armenia

Noravank, Republic of Armenia

Noravank, Republic of Armenia

Saint Gregory Cathedral, ruined city of Ani, Republic of Turkey

Tatev monastery, Republic of Armenia

Outside of a Chapel, Yeghegise, Republic of Armenia

I recalled browsing a book that featured a plate of a sarcophagus, in "Kafiristan", Afghanistan, that featured the "Eternity" symbol.
However, recent attempts to find any images online brought nought.

Being a member of the British Museum, I get their quarterly magazine.
For the Spring/Summer issue of 2014 they featured a section on the "Gandau" statues used by the Kalash people, living in the Chitral valley of modern-day Pakistan.
Below is a  photo from the said issue of the magazine, page 51, the photo is by Luke Rehmat:

Notice the similarity of the symbol used on the Gandau statue on the right, to the "Eternity" symbol used in medieval Armenian funerary and Church art.
Another example of this pair of Gandau, from the website pakwheels.com

Another pair of Gandau from the same website:

Below is from the website davecullen.com, showing a an image that features sarcophagii of the Kalash people:

Compare with another look at my photo of the outside of the dome of the Cathedral of Saint Gregory, in the ruined city of Ani, today in the Republic of Turkey:

Below is from the website madamepickwickartblog.com

The Goat Sacrifice to Sajigor-Shura Verin-Indra, the "kafir" God of Power, Wealth and Fertility

View of the inside of the Temple for Kalash men, from the website kjti.co.uk

The Kalash tribe, around 2,000 strong, survive in the remote Chitral valley of north-west Pakistan. Formerly sharing much in common with neighbouring peoples in the "Kafiristan" region of Afghanistan, until those people were forced to convert to Islam in the late 19th century by the Emir of Afghanistan, who renamed the region "Nuristan". 
Also in the 19th century came about the myth that the Kalash people come from "Alexander the Great". 

Up until then, they had never claimed such descent, it was the British Scholar, G. S. Robertson (An Inquiry Into The Ethnography Of Afghanistan, 1891, by H. W. Bellew & G. S. Robertson) who made the link to Alexander the Great. 

Recent genetic testing has shown that the Kalash people have Indo-Iranian, rather than Macedonian or Greek genetic ancestry.

If there is any remote link between the Kalash people and Armenia, it may derive from Armenians being deported to the remotest parts of Khorasan (Afghanistan) during the era of the Sasanid Persian Empire, for example during the reign or Shah Yazdegerd II, or from a far older Avestan connection.