Gold bars weighing almost half a ton and a special press designed so visitors can strike their own White House medals are part of the new displays in the exhibit hall of the Deparmtne of the Treasury.

The entrance to the Treasury Exhibit Hall is located on East Executive Avenue. The hall is open Tuesday through Saturday from 9:30 a.m. to 3:30 p.m. Admission is free.

The 30 gold bars on display are of 999.8 fine gold, and are valued at $552,790.

An 80-ton hydraulic press in the hall has a special triggering attachment to activate the press to strike a 1 1/2-inch pewter medal showing the White House on one side and the presidential seal on the other. The pewter blanks can be purchased for $1 and nade into medals, or the medals can be purchased ready made at the Mint sale counter in the exhibit hall.

Other new exhibits assembled from agencies within the Treasury Department include: a replica of the first telephone installed in the Department in 1877; various office machines which were in use at the turn of the century; an antique hand-operated currency press; a moonshine still; a replica of a 1792 screw coin press; a re-creation of an early U.S. Assay Office where gold miners brought their precious metal discoveries for testing and purchase by the government.