While driving around today, we had the good fortune to stumble upon the Salvage Garden, located in a decommissioned church. Among the treasures was this wooden pattern, said to be for a blow moulded gallon plastic oil container, the shape is not identifiable to me (the label changes everything).
The pattern would be used to form the mould cavity, in plaster or more likely epoxy. I suspect it's from the 1980s, blow moulded oil bottles were introduced in the mid to late seventies, and by the 1990s, if patterns were used at all, they were modelled in CAD and usually machined in urethane foam using CNC.
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