Part Number: 1506523 (Ind, oxy flow) Part Number: 1506523-4 (Oxygen flow indic) Part Number: 1506523A (Indicator) Part Number: 1506524 (Receptcl) Part Number: 15065253REVA (Call scott) Part Number: 1506528 (Retainer) Part Number: 1506529 (Case) Part Number: 150652E (Ne) Part Number: 15065-3 (Switch) Part Number: 150653-1 (No description) Part Number: 15065318CDC (15065318=cdc) Part Number: 1506532 (Phoenix contact) Part Number: 1506532-1 (Switch) Part Number: 1506532-103 (Spacer)