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So Raspberry Pi have a new model out (the Raspberry Pi Zero W). Having taken a look at the photos, I see that on the reverse, where the CE and FCC compliance marks are shown, there is another symbol. It's hard to describe - something like a "T" with a parallel bar over the top enclosed by a three-quarter circle and a horizontal lightning bolt above the "T" but inside the partial circle.

Here's a picture:

Photograph of reverse of Raspberry Pi Zero W

and a close-up:

Unknown symbol on reverse of Raspberry Pi Zero W

Does anyone know what this symbol represents? My guess would be another compliance mark.

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    \$\begingroup\$ Worth to mention: What you call the "CE mark" is actually not the real one since the C and the E are too close together. The one you see one the board is jokingly called "China Export": raspberrypi.org/wp-content/uploads/2012/04/CE_marks.jpg \$\endgroup\$ – Wojciech Morawiec Mar 3 '17 at 10:39
  • \$\begingroup\$ Yeah, I spotted that - think it's an oversight on their front as the original Pi Zero has a correct mark. And that image referring to "China Export" is actually from the Raspberry Pi website itself! See this comment for more. \$\endgroup\$ – stefandz Mar 3 '17 at 10:42
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I was wondering this myself, however some fairly extensive image digging revealed that it’s something approximate to the Japanese equivalent of the FCC certification mark, sometimes called Giteki. Japanese law seems to prescribe that radio devices should have this mark to be used in Japan.

http://incompliancemag.com/article/wireless-certification-in-the-land-of-the-rising-sun/

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    \$\begingroup\$ there's a nice Q&A on it here - tele.soumu.go.jp/e/adm/monitoring/illegal/monitoring_qa/… apparently this mark has been around since 1995! +1 for your research \$\endgroup\$ – JIm Dearden Mar 2 '17 at 15:15
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    \$\begingroup\$ Nice find by @JImDearden, that Q&A reveals the old style Giteki mark too. image \$\endgroup\$ – Jonathon Hodges Mar 3 '17 at 9:52
  • \$\begingroup\$ Also good to know - the name used in that Q&A is the "Technical Conformity Mark". \$\endgroup\$ – stefandz Mar 3 '17 at 10:45

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