In everything I've ever read either for pleasure or for my major (History with specialization in the Tudor Period and First Bonaparte Dynasty) I've only ever seen it called a Chain of Office.

I can tell you about it though.

Dating from the late fifteenth century this collar illustrates the period of reconciliation following the onset of the Tudor reign, combining the Lancastrian 'S' (for Sovereignly), with the emblem of the Yorkist Rose.


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AIM: Ysselt
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http://en.wikipedia.org/wiki/DragonRealms