Haggarty's seems to have disappeared in the early 1970's. The last display ad I could find was on 1/2/1970. The Pasadena store closed in May 1970. The branch stores were very small--the Downey store was 9000 square feet--and my impression by the ads is that they sold only women's clothes though some stores had children's clothes as well.
The first store was at 522 W. 7th. The Beverly Hills store opened in 1938 at 9544 Wilshire and evantually housed the chain's business offices.
These are the store locations from 1964 and 1970:
1964: Beverly Hills, Pasadena (350 S. Lake), Santa Ana, Lakewood, Bakersfield, Glendale, Palm Springs
1970: Beverly Hills, Pasadena, Lakewood, Canoga Park, Glendale, Downey (Stonewood), Pasadena, Palm Springs