Rusty Goats started this and I'm dying to know so here's the first thread. Clarkston1 uploaded the photo. How many are there?

Heres a quote from beercanhistory.com
As an example of the limited on-grade and "under-the-house" condition examples that are known for one of rarer brands, Chief: Bob Myers through a newspaper ad in 1970 made contact with a man who had found 5 Chief cans, grade 1-/2+, under a house a few blocks off a Southern Calif. freeway. Several of these Chiefs turned out to have fragile labels and much of the red color on one of the Chiefs was washed off with a simple rinsing. One each of these Chiefs went in trade to John Ahrens, Wally Gilbert and John Thimios. In 1987, a San Francisco collector located a mostly 1/1+ example that had been found in a building in a Southern Calif. city and was sold to Gene DiCicco; a less than grade 1 example turned up on ebay around 2003-4 that was part of a small beer can collection assembled by a long time flea market searcher/seller in the San Diego area.
So that should make at least 8 so far?

Sold a Chief from Hastings Collection at Portland Last Year.

Robbie