At one home, the thieves took diamond earrings worth $2,500. At another, in the 1100 block of Oak Knoll, they took $110,000 worth of antique watches.
The common denominator in all the thefts is that the valuables disappeared while the homes were being shown during open houses.
"I felt like I lost my mother twice," said a woman, who wanted to remain anonymous.
The woman says she lost $32,000 worth of jewelry and watches hidden in a drawer; including priceless heirlooms from her mother.
"That evening, my husband opened up his drawer of his dresser and all of his watches were missing. And, I immediately jumped out of bed and ran to the closet. It hadn't even dawned on me that somebody might have burglarized us. And sure enough, all of my shorts were topsy-turvy and all of the jewelry boxes I had were opened up and everything was gone," said the woman.
Pasadena police says their investigation has been hampered because not everyone has reported the thefts.
Officers know of four incidents, but believe there are more.
"There are two things we are looking for at the Pasadena Police Department: One is to make sure that people are aware that this happens, and it occurs and it is, in fact, occurring right now. And, two, whether or not there are any other victims out there to please give us a call," said Janet Pope Givens, Pasadena Police Department.
Pasadena police feel they don't have enough information to put out a definitive description of the criminals in this case.
However, real estate agents in the area have compared notes and they say in all cases, the thefts were perpetrated by the same duo.
Realtors say every open house was attended by two women who claim they were a mother and daughter from Glendale. One woman walked with a limp. The two occasionally spoke in a foreign language. When checked, the address they gave was not valid.
"What I found out was that there was a mother-daughter who had come in and had given an address on Brand Avenue. But anybody that lives in Glendale knows that it's Brand Boulevard," said the woman who preferred to remain anonymous.
If you have any information, you are asked to call the Pasadena Police Department at (626) 744-4522.