I have posted a new update to my website (New Pentel Project – Nimrodd's Blog). This contains 2 updates, first, I added the SG17 to the SG15/SG17 page (for some reason it got missed in the previous updates, although it was listed in the index). The other update is a small addendum to the Excalibur article, showing the evolution of the Excalibur Crown logos.
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Thanks for keeping the book updated. 
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