The star of this batch of old banjo necks is the 1925 Vega Regent plectrum neck.  Serial number on dowel stick is 78108, string scale is 27”.  Two-piece maple neck with a nice thick 22-fret ebony fingerboard, both the frets and the nut appear to be original.   Tuners have been changed but the grained ivoroid buttons remain.  Dowel stick is solid and measure 10 1/2”, this neck is very straight but note the fret wear. Finish has been added to this neck, but it doesn't appear that anything has been sanded and re-shaped. 

19-fret maple tenor neck has a replaced dowel stick, but the original finish appears to be shaded lacquer, so it probably dates to 1926/‘27 or later.  With the wreath headstock inlay it was most likely a Tubaphone model, Style M is a good guess. Neck is straight, 19-fret ebony fingerboard with 23” string scale. Note binding is missing on treble side above 11th fret.

17-fret maple tenor neck that’s been robbed of both its dowel stick and headstock veneer, binding and several inlays are also missing.  

Maple 5-string neck by unknown maker. 21 brass frets, 26 1/2” string scale, there is no separate fingerboard.