A Nervex Ref 32 bottom lug. From arguably the most elegant set of lugs ever made. I brazed up about a thousand of these until the middle 1980s until I finally succumbed to the IC era.
These parts were made in France up until the end of the Nixon era, and I’d buy parcels of 200 at a time from my source in Paris. They were manufactured on demand. Could be ordered with or without a window. Could be ordered with or without extensions welded on. Each of the three lugs was offered in four specific angles.
The 32s took a lot of labor to get from the as-delivered state to one as beautiful as shown here. For me, it was a good hour per side to remove the perimeter metal that didn’t fit my vision for the finished piece. Then thinning them down was almost as much time. But it was worth it. Just look at this picture. Study it.
No other lugs fit as well, were as versatile, or held heat better. They were perfect. And I don’t say that often about many things.