The gunpoint robbery took place at one of the most prominent intersections in the nation’s capital: Connecticut Avenue and K Street NW.

On Friday, three men were sentenced in the Oct. 17, 2011, daytime holdup. Gold coins worth more than $10,000 were taken from a business, and three victims were threatened, said the U.S. attorney’s office for the District of Columbia. The oldest victim, an 82-year-old customer, was hit in the head with a knife handle, the prosecutors said.

The robbery occurred at Capitol Coin & Stamp Co., the prosecutors said. It is on an upper floor of the building at 1001 Connecticut, above a Farragut North Metro station entrance.

Melvin Simon, 54, and Stanley Williams, 50, were sentenced to 17 and 12 years in prison, respectively, after pleading guilty June 18 to armed robbery, the prosecutors said.

Simon’s brother, David Simon, 45, who had waited in a getaway car, was sentenced to 12 years after pleading to conspiracy to commit robbery, they added.