Spending too much time doing research. Did more research, your pump is a 70. None of my literature shows the pump without ad glass panels. No way to determine why the pump was made without panels, this was usually only done with commercial pumps. I have also located a couple of pictures of your pump, possibly one is your pump, it is all rusted and is shown in front of a fence. The other picture shows a restored pump.
Last edited by Jack Sim; Sat Oct 21 2017 08:27 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