Campagnolo Nuovo/Super/C-Record bottom bracket lockring (or locking ring if you prefer), hailing from Italy and in production from the 1960s to the 1980s (yet still new & unused after all this time). Made from steel and weighing in at 13 grams. A fine choice for keeping your vintage bike authentic, but also great for any other compatible bike. As well as the various Record groups, these were also supplied with Gran Sport, Victory & Triomphe bottom brackets in the 1970s & 80s. .
eBay