Early Notifier and System Sensor strobes

Fire Alarm General Discussion
1

I noticed that the Wheelock WS-24, Notifier NWS-24, and System Sensor SS-24 and SS24LO all have the same current draw (25 mA), and the SS24LO and WS-24 are both rated for 1.5 candela. Also, the SS24M has the same current draw (75 mA) and candela rating (15) as the WH-24. Did these early Notifier and System Sensor strobes have internal hardware outsourced from Wheelock?

2

Could be actually considering Wheelock was supposedly the first maker of strobe lights for fire alarm service.

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3

This Faraday strobe also has the same current draw as the other 15 candela strobes. There is also a 120 VAC version of the strobe with a lower current draw than Wheelock’s WH-115.