The Ross “Crown” Full Circle, The Ross No. 10 Hand Water, The Ross “Star” Half Circle Sprinklers

The Ross Crown full circle sprinkler appears to made with a non brass pot metal material with a brass nozzle insert. They were highly popular on the west coast in the 60’s/70’s.
The Ross No. 10 hand watering hose attachment has a patent date of 1924 from Pasadena California.
The Ross Star half circle is a well used brass sprinkler with a manufacturing location of Rosemead California.
Without much knowledge on the history of these. I would be guessing to say if these 3 sprinklers are from the same manufacturer with different production locations.
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