fragment of an Anglo-Saxon helmet
... that a 4 cm (1.6 in) long fragment of an Anglo-Saxon helmet was bought for £15,000?
... that a <span about="#mwt29" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"4"},"2":{"wt":"cm"},"3":{"wt":"in"},"abbr":{"wt":"on"}},"i":0}}]}' id="mwAZ4" typeof="mw:Transclusion">4</span><span about="#mwt29" typeof="mw:Entity"> </span><span about="#mwt29">cm (1.6</span><span about="#mwt29" typeof="mw:Entity"> </span><span about="#mwt29">in)</span> long <b id="mwAZ8"><a class="mw-redirect" href="./Horncastle_helmet_fragment" id="mwAaA" rel="mw:WikiLink" title="Horncastle helmet fragment">fragment of an Anglo-Saxon helmet</a></b> was bought for £15,000?