Possibly this post should not have been moved, but I believe what you have is as you mentioned diamond shaped bottles from Mobil. There are guys here on OG who will give you more info than I have, but these bottles are somewhat rare, but...in order to fill them they require a special attachment that attaches to the dispenser.
You are getting away from collecting oilfield memorabilia, the next thing is that you will finally find a gas pump, and then the wife's car will not fit in the garage with all the stuff you find.
Keep it up, there is still a lot of stuff out there waiting to be found, just use this site to see what is found and what is selling.
If you like gas pumps, just send me your email address and I will let you know when my next gas pump book is ready.
Author, Gas Pump Identfication books 1st & 2nd Editions & Air Meter Identification books
We rebuild ECO air meters and sell parts.