Your search query on "HELICOID Inspection Gages" returned the following results:

Vintage ACCO Helicoid Pressure Gage 0-100 PSI inspected sbp, Free shipping (304317460543)

Acco Helicoid 6 W-600-2 Test Gage Pressure Gauge (334920510202)

ACCO Helicoid Gage 4.5" W-400-5 Steampunk Style Gauge (126397462544)

ACCO Helicoid Gage 4.5" W-Vac.-0.2 Steampunk Style Gauge (126397462549)

Helicoid 410-Rtd Guage - 6" - Range 15 - (251456502631)

Helicoid 2428 Pressure Gauge, HD-80 0-800 PSI USIP (185591036068)

SET OF 15 SKYDROL HYDRAULIC GAUGES 5000 PSI 5K HELICOID GAGE BMS3-11TEST TESTING (132848652203)