That is not the Davis Vertical Feed. The VF has a needle plate that is rounded on the sides and straight on the front and back. The needle plate can be rotated, depending on type of fabric one is sewing. The VF doesn't have feed dogs.
Hopefully, jlhmnj or Macybaby will be able to identify it. Davis made a lot of machines and many have other names on them.
Janey - Neat people never make the exciting discoveries I do.