Valve cufflinks made for a bride's father

I was asked to make a pair of silver cufflinks as a gift for a man who owns a company that makes valves. The valve shape was changed slightly so that the top was lifted away from the other end to make a fixed fitting to push through a shirt. Apart from that change, the shape was replicated.

This is what the cufflinks look like from the front.

Here’s what they look like with one facing the front and one facing the back.

This image shows them from the side.

…and here’s how they look with another diagram.