F1 handset

[Jack Aman]

Sorry about the bonehead question, but here goes.  I have a couple of handsets that look similar, both marked "F1"   One style has wires that go up the handle to the earpiece.  The other doesn't.  My question:  in the style that does not seem to have wires up the handle, how does the receiver get signal?  Are they compatible with all old phones?   Thanks.

[Dave Beck]

The one with no wires showing has the wires imbedded in the bakelight and is the older of the two. Both will work well.

[Kenton K]

The one without wires is also older than the one with wires. Paul-F has a lovely chart with a timeline. There are also F1 handsets without a groove running across the handle that you should keep an eye out for.

KK

[paul-f]

The chart is here:
  http://www.paul-f.com/we300typ.htm#F1evolution