Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums General Petroliana Discussion Standard Oil Flange

I am trying to get some info on the Standard Oil Flange. I have posted a photo of one for reference. Here are my questions for discussion:

What was the date for the usage of the flange?
Was it primarily used in service stations and which parts of the country?
Does anyone know what is the proper size?

Also, if anyone has a “less that perfect” extra one that they want to let go of please contact me.
Thanks,
Steve