Marnie psyched On the just-ended season of Girls, Marnie accepted Desi’s marriage proposal, sounding the death knell for anyone hoping that she’d somehow reunite with Charlie to make “brown babies.” The 1920s bauble sported by Marnie (Allison Williams) was supplied by local jeweler Erica Weiner, who owns shops in Nolita and Boerum Hill.

Weighing 0.36 karats, the center European-cut diamond is flanked by handmade filigree and eight smaller diamonds on the ring’s platinum band, Weiner said. “We’re thinking it was probably made in America. There was a lot of this kind of filigree, white gold, diamond engagement-ring making going on in New York and around the East Coast in that part of the 20th century.” Weiner purchased the ring from an estate in rural Maine while visiting her family. Two years ago, it was priced at Erica Weiner for $2,600, but she says it’d now retail for closer to $3,000. While the ring bears no designer’s name, it is engraved with two sets of initials and the year 1926. “We travel all over the country and buy these old things that are in good enough shape that they could last for another whole marriage and lifetime,” Weiner said.

Marnie's ring Girls costume designer Jenn Rogien selected the sparkler from Weiner’s website during production on season four last summer. Rogien wasn’t looking for “out-of-control big diamonds,” Weiner said. “It’s pretty modest, it looks like an heirloom. I think it was supposed to be something his family had already, so that was like an extra-special thing.”

Typically, stage and screen productions require duplicates of items for the props department, but that wasn’t possible in this case because the ring is one-of-a-kind. Both the ring’s age and price tag seem to solve a mini mystery: Desi (Ebon Moss-Bach) does not appear to have spent the couple’s $2,000 advance from a recording label executive — played by guest star Spike Jonze — on its procurement. Before the proposal (filmed at Toby’s Estate in Williamsburg), Desi squandered the advance on “the tightest fucking German guitar pedals ever made in history,” which Marnie implored him to return.

Unfortunately, there’s no buying the ring for the beloved Girls fan in your life, since Weiner no longer has it — but you can find similar ones here, here and here.