First of all, the oil companies did not make pumps. They were made by companies such as American, so what you have is an American pump that was branded Sinclair. I identify 33 different American visible pump is my Gas Pump Bible identification book, but I can't find one that is exactly like yours. None of my pictures show a top (bonnet) that flares out at the bottom. Your pump appears to have a tapered cylinder surround, the cylinder is straight, but the rods supporting the top are slanted. Is there any other ID tags on the pump? If so, please post them here. I have never owned an American so I can't identify it, but I am sure someone here on OG will recognize it and give you an answer.

I sure looks like her dad did a very nice job in his restorations

Jack & Cindy Sim

Last edited by Jack Sim; Mon Jun 22 2020 02:15 PM.
Author, 1st & 2nd editions of Gas Pump ID book, 3rd edition is now available at www.gaspumpbible.com
Air Meter ID book also available