Vintage Postcards Eric Ericson Humorous Bird/Hobo Set of 3 Paper Ephemera For Sale

Adorable set of three vintage Eric Ericson humorous postcards unused, vibrant colors and very little condition issues-slight corner bends, & the "Just A Line..." one has a slight denting by telephone pole and a tiny white spot at the top. The two bird cards are very fun and the bum, or hobo one is cute.  Eric signed that one "Bum Ericson", which just is so delightful, it makes me giggle!  Detail on the postcards is charming.  These would look super framed all together.  Measure 5 1/4" x 3 1/2".  Not sure when these were made, but they are true vintage for sure. From my research, USPS postage at 1 cent for postcards was from 1898 to 1958. I believe the age of these cards lays somewhere between those dates! 1930’s??