About 2,000 items, including rings, necklaces, bracelets, earrings, watches, antique clocks, coins, two antique rifles and two swords, seized by D.C. police from the Duluth, Minn., home of Bernard C. Welch Jr. and from a Minnesota antique dealer to whom Welch sold property were put on display yesterday for the media.

D.C. police said they believe the property, conservatively valued at more than $75,000 for the jewelry alone was stolen by Welch, the accused killer of Dr. Michael Halberstam, from Washington area homes since the fall of 1979.

Displayed in a half-dozen wood and glass cases and on a table, the property -- all tagged -- was worth much less than the nearly $4 million worth of valuables seized from Welch's home in Great Falls, Va., last month. When those items were displayed in Fairfax County last month more than 3,000 people showed up hoping to find articles stolen from their homes. Police said more than 300 burglaries were solved as a result of the display.

D.C. Police Chief Burtell M. Jefferson said the property will be placed on display for the public from 8 a.m. to 8 p.m. on Jan. 30 and 31 and Feb. 1 in the police training academy at 4665 Blue Plains Dr. SW.

Included among the items displayed yesterday at the D.C. police property division were an emerald-cut diamond ring estimated to be worth from $11,000 to $25,000, a $4,000 heart-shaped broach with 15 sapphires and a $3,000 ivory incense burner made of an elephant tusk.

Also lining the table was a U.S. Army carbine with an inscription of 1861 and a large-barrel rifle weighing about 30 pounds.

Although most of the allegedly stolen items were jewelry and antiques, there were other pieces, including a book, entitled. "The Very Rich -- A History of Wealth" by Joseph J. Thorndike Jr.

When the articles are displayed only those persons who have reported burglaries to police will be allowed to view the stolen property. Persons who positively identify items as their own will not be allowed to take them, but will be asked to give police the tag numbers. At a later date, arrangements will be made for them to claim their stolen property.

Capt. Clarence Dickerson, head of the D.C. burglary and pawn unit, said police have no idea how many burglaries may be reflected in the items.