RC81 Mark I Charleston Cufflinks

When you rotate the diamond studded lever — which can be worn flipped to one side for a concealed, sober day-time look, or flipped to the other side to reveal a 20 TW VVS1 diamond studded night time extravaganza — an optimal force translation results in sixteen pirouetting parts in its internal “gearbox” (that’s right, these cufflinks have a gearbox!) to turn and lock the link into your cuff, affording you the tightest fit of any cufflink available today.

Excellent for those occasions when you simply can’t afford to have your cuff peering out from under your jacket.