Lot of old telephone bells ringer parts, steampunk vintage

Lot of two old ringer bell assemblies for telephones. These are from the estate of a man who repaired and restored phones. the bells are 1 3/4" across.

When we hooked these up to 110 volt AC, you can feel the coils charging and the hammers vibrate. We don't know how to wire these or what the correct voltage is and so we're selling them for parts.

this item no longer available
Item No. k624500