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This is a vintage or antique Brass Grinnell 6\"Pressure Gauge, 0- 250 psi.Untested, in reasonable condition but needs cleaning / restoration. See pictures for condition. It is untested. It measures 6 inches bottom diameter, 5.5” top diameter by 2 inches deep with a 4 inch face. Labeled: Grinnell Company. Providence, R.I. Air. Retard Sprinkler. 1923
It has a symbol that reads: “The Ashcroft Mfg Co, N.Y“
I believe the fine print reads: Reg. U S Pat Off. Pat July 4, 1910. Patent Pending
