Portrait of  Gentleman, wearing a gorget, traditionally (incorrectly) identified as Sir Martin Frobisher (c. 1535-1594).
<bdi>Circle of <a href="https://en.wikipedia.org/wiki/en:Marcus_Gheeraerts_the_Younger" class="extiw" title="w:en:Marcus Gheeraerts the Younger"><span title="Flemish painter">Marcus Gheeraerts the Younger</span></a>
</bdi>
<a href="https://en.wikipedia.org/wiki/Christie%27s" class="extiw" title="en:Christie's">Christie's</a>, LotFinder:  entry  <a rel="nofollow" class="external text" href="https://www.christies.com/LotFinder/lot_details.aspx?intObjectID=6165222">6165222</a> (sale 16386, lot 84)