Where to search vintage silver bar old pour logos when google images doesn't deliver :)

Yeah I'm sure it's me and not google, but where do you go for old pour information?
Like this bar with a circle G logo.

 

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I did run across this blog site from a Ken Conaway.
silveringot.blogspot.com
A blog for collectors of silver ingots, old pours and extruded bars.

I googled all the G bars listed but didn't see what I pictured.

G & G
G & S
Gateway
General Metals
Gila Development Company
Global Metal Refiners
Global Minting
GM
GNSC
Goldhorn
Gold Bug Mines
Gold & Silver Bullion Exchange
Gold & Silver Exchange
Gold Silver & Gem Exchange
Gold Standard
Golden Analytical & Refining Company
Golden Eagle Refineries, Inc.
Goldfield Ledge
GOS
GR
GRC
Great American Silver Company
Great Western Coin & Bullion Company
Green Duck Corporation
Green Valley
Greens Creek Mine
GSR
Gulf Coast Coin
Gulf Corporation Council

Thanks Ken for site,