Shrenuj USA, a 100-year-old diamond manufacturer, will be taking a full floor at 64 West 48th Street, a Midtown building owned by Muss Development, it was announced yesterday.

The company is taking a 4,000-square-foot showroom and executive office space on the 15th floor of the 17-story building.

Brian Given, Lou Prisco, and Eric Lassoff of Colliers International represented The Muss Development in the deal. Mr. Lassoff also represented Shrenuj.

Since buying 64 West 48th Street in 2008, Muss Development had spent millions upgrading the building’s lobby, elevators, and facade, among other improvements.

In the past 18 months the firm has leased space to On Press Graphics, Frank Blancato LLC, World of Travel, City Sports, and Weight Watchers.

When The Muss Development signed Weight Watchers in March, the firm decided to experiment with its traditional approach to its office spaces by giving Weight Watchers a 3,000 square foot “meeting space” for its users to attend weigh-ins and group meetings.

“With Shrenuj we now only have two remaining full floors in the building, and expect those to be leased by year’s end, if not before,” said Jason Muss, principal of Muss Development, in a statement.

Asking rent in the building is in the high-$40s for the top portion of the building and the low-$40s for the lower floors.

Shrenuj is an integrated gem and jewelry conglomerate that operates in 14 countries and employs over 2,000 people worldwide. The company. which does diamond processing and jewelery manufacturing and retail, has diamond manufacturing facilities in India, Bostwana and Israel.

Daniel Edward Rosen is reachable at drosen@observer.com

The Mercedes showroom in 430 Park Avenue is one of the few commercial spaces in Manhattan designed by the famed architect Frank Lloyd Wright. Now, with Mercedes set to leave the location at the end of the year, 430 Park Avenue’s landlord, Midwood Properties, is said to be in the market shopping for new tenants.

Mr. Wright designed the space in the early 1950s for the European car importer Max Hoffman and for years was known as the Hoffman Showroom.

The space is a miniature prelude to Mr. Wright’s architectural triumph the Guggenheim Museum, featuring a small circular ramp that allows cars to be displayed and also to exit the showroom onto the street outside via a sidedoor.

The floor features a circular track that at one point allowed cars to be parked on a rotating display, but an attendant at the Mercedes dealership who gave The CO a tour on Tuesday said that motor powering revolving track has long been broken.

For all the space’s charms, it would appear to present a leasing challenge.

First, it’s landmarked, which could make adapting it for use by another type of tenant difficult. Mercedes has occupied the showroom since the late 1950s and is leaving to consolidate on 11th Avenue where it has a larger showroom.

Brokers familiar with the space say that finding a replacement auto dealership is likely the easiest replacement and Mr. Wright’s timeless architecture would likely be a selling point in that approach.

John Usdan, chief executive of Midwood stubbornly refused to field The Commercial Observer’s calls inquiring about the space.

The CO will post a slideshow with pictures of the space on Wednesday.

Daniel Geiger is reachable at dgeiger@observer.com