Re: dating your Davis: I have a DVF, serial# 3755318, with order documentation 12-13-1918, and purchase documentation 12-30-1918. Purchase price was $64.50, and a trade in of an older Davis valued at $15.00, making the full price $79.50. $14.50 was paid at delivery, and a $50 note at 6%/annum, due on or before 2-1-1919.