Determining the value of a Duck House doll is based on its physical appearance as well as on the logo and collector numbers stamped on the back of the dolls neck. Each doll should also have a certificate of authenticity.
The Duck House Corporation logo is a picture of a feather with Duck House written across the bottom third of the feather. The words Heirloom Dolls is under the logo with a set of two numbers separated by a slash mark. The set of two numbers contains three or four digits before the slash and four digits after. Collectors used to believe these numbers identified who the doll was but it has been discovered that they describe the number sequence pertaining to various doll designs. In other words, 001/5,000 means that the doll was the first produced in a line of 5,000 dolls of the same design. The lower the number is in the first set of digits, the more valuable the doll is likely to be to collectors.
The certificate of authenticity is important when pricing the doll. Each certificate guarantees the doll is an authentic Duck House Doll. It contains the doll’s name and sequence number corresponding to the number stamped on the doll's neck. Each certificate is signed by Mei Lien Chang, Vice President of Duck House Dolls. Without a certificate, the doll's value drops significantly.