Set of Framed Prints "Horse and Buggy Days" #6085A and "The Big Moment" #6085B

I have a set of prints in original glass frames, both by Paul Detlefsen.  Both of label stating, "Product of Reliable, Newark, N.J."  (1) "Horse & Buggy Days" stamped 6085A; and (2) "The Big Moment" stamped 6085B.