Seymour J. Spelman, 66, a retired labor lawyer and former government attorney who in 1966 ran for Congress in Montgomery County as a peace candidate, died April 23 at Veterans Hospital in Perry Point, Md. He had Alzheimer's disease.

Mr. Spelman had a private practice in labor law from the late 1940s until retiring for health reasons in the late 1970s. He had been a partner in the firm of Spelman, Eisenberg & Wagner, which had offices in Arlington and Washington.

His clients included a group of rank-and-file Teamsters that successfully fought their international organization, exposing the misuse of union funds. These funds included more than $600,000 used to pay the legal fees of then-union president James R. Hoffa to fight criminal prosecutions.

Mr. Spelman also represented the Washington local of the International Typographical Union and the Washington-Baltimore Newspaper Guild.

In 1966, he ran for the Democratic congressional nomination in Maryland's Eighth district. His platform was based on opposition to this country's involvement in the war in Southeast Asia. He finished third in a field of eight. The winner of the primary, Royce Hanson, was defeated in the general election by Republican Gilbert Gude.

Mr. Spelman, who lived in Washington, was a native of Binghamton, N.Y. He was an honors graduate of the University of Michigan law school. He served in the Army during World War II. After the war, he was a legal adviser to a member of the National Labor Relations Board and a legislative aide to Sen. Carl A. Hatch (D-N.M.).

He had served on the executive board of the Washington chapter of SANE, a nuclear disarmament group, and the Washington Peace Center. He also had provided legal services for the American Civil Liberties Union.

His marriage to the former Virginia Golden ended in divorce.

Survivors include his wife, Mary Jane, and their son, David, both of Washington; two daughters by his first marriage, Judith Spelman of San Francisco and Marcy Greer of Sarasota, Fla.; two sisters, Helen S. Rogers of Columbia, Md., and Annette Ackerman of Binghamton, and one grandchild.