Yes, thats it. I thought that the earth logo pre-dated the winged foot, but your bottom pic (bigoil mentioned its circa 1920s) proves me wrong. I learned something new today. Thanks for your help.
BTW...love the signs oldgoaly. Thanks for sharing.
Paul, Always glad to help! some people on here do a lot more than I do. Btw I traded some old tractor-implement manuals for a bunch of signs, I have a buck a pc in those signs..... of course I've had them for 25+ years. tt