1. Sinker (fishing) Bookmark Sinker (fishing), museum number 1-24021. Search result 1 Museum number: 1-24021 Culture or time period: Middle Horizon: Lower Berkeley Pattern (ca. 3500–500 BC) and Upper Berkeley Pattern (ca. 500–1000 AD) Object class: Sinkers (fishing) Function: 1.1 Hunting and Fishing Dimensions: length 292 grams Collector: Llewellyn Lemont Loud Collection place: CA-CCo-300, Richmond, Contra Costa County Collection date: March-April 1922