Below is a picture of Boyle Dayton Indicators from original sales literature. Neither picture shows the shield shape we often think of as being Boyle Dayton. I know different indicators could be installed by jobbers or by restorers using whatever set they had handy. After Wayne bought BD did they refurbish old pumps with the shield indicators?
I have also included a rhombus shape that was seen in a Fry Pump. They look similar to the BD 74 except for the holes. Does anyone have a Boyle Dayton 74 with the rhombus shape shown in the sales literature?