help identifying the year of a photo

I am trying to date a photo.   I know the boat was built in the late
1930's but the person who gave me the photo said it was taken in
1949.  I don't believe the boat was in the area during the late 1940's
but I could be wrong.

Unfortunately I don't know a lot about antique cars.  Can someone
please tell me the year of the cars in these two photos.  If I know
the year of the newest vehicle in the photos I can narrow down the
year
thanks
http://picasaweb.google.com/DaveHV/ShepherdBoats