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To me it looks like they may be oil or fuel indicators. If fluid is flowing, then you're good. If not, well...
ReplyDeleteJust a wild guess but they look like oil flow sight glasses.
ReplyDeleteAnd no, not even the Sprite is thàt old.
😂
Beans and Phil called it correctly, they are oil flow indicators.
ReplyDeletehttps://forums.aaca.org/topic/172089-blower-bentley-question/
The old Hart-Parr tractor engines had these to regulate the water injection into the cylinders.
ReplyDelete