Need your help guys!

[Fred W. Schneider III]

I have a chance to buy a Conestoga Traction Company fare clock or fare
register ... round face ... single trip count with total window below
... complete with mounting hardware.  Initials of owning railway are on
face plate. Was last in use about 1942.  The widow has no idea what it
is worth and neither do I but I want give her a fair price. Can any of
you give me a dollar range, retail, that one might expect to pay.