Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums General Petroliana Discussion Gulf NO-NOX: two holes on bottom?

I owned one with one hole in the bottom. I am not aware of this sign being reproduced. It seems there are production anomalies at times. I have an original Texaco Sky Chief Petrox Pump Plate that was produced without the date at the bottom. The reason for the two holes is still a mystery.