Based on search results, is not a US Zip Code, but a widely recognized Vintage Jewelry Patent Number associated with earring hardware used by several high-end makers during the 1950s. Overview of Pat. 156452 Item Type: Clip-on earring mechanisms/designs. Era: Predominantly 1950s vintage costume jewelry.
Prices vary depending on the designer and condition, typically listed on marketplaces like Etsy or eBay ranging from approximately $20 to $50 CAD for sets or individual earrings. 156452 zip
Often featured in Art Nouveau or nature-inspired filigree designs. Based on search results, is not a US