Soda Bottle ID - Peerless Glass Co.??

I have this very old looking (bubbles in the glass) clear soda bottle. There is a manufacturer or maker's mark on the base–no other info besides this logo. Unfortunately, there's a bubble right where the first of four embossed characters would be so it is partially obscured.

It shows two light seam marks (in half, or 180 degrees) just at the mouth and the seams stop there and don't travel down the neck, shoulders, or main body of the bottle.

So far, my best guess is PGCO for Peerless Glass Company but I can't find a matching logo shape used by this company. My biggest hope is that it could stand for PCCO meaning Pepsi-Cola Company?

Volume is about 9 ounces or 275ml
Dimensions are 7.75 inches tall x 2.375 diameter base, or 20 cm tall x 6cm base
Weight is 13.7 ounces or 388 grams

Thanks for any help you can provide.

 

I have attempted a rubbing and a tracing with drawing software to help show the shape of the letters since it is difficult to photograph. The first character in the logo is not evident. Not sure if the second is a "C" or a "G"?