These are two framed color limited edition, signed and numbered, lithograph prints by a regional contemporary artist, Beverly Reordan. Here is a link for you to her website: http://beverlyreordan.com/about.html
The number series indicates these are each limited edition, numbered prints. One was done in a print run of 325 copies and the other in a run of 350 copies. Both are signed by hand by the artist in pencil at the lower right in the margin. The '79 is for the year, 1979. The estimate is for each print individually and is based on actual recent past recorded auction sales of comparables. Retail 'asking prices' can be higher and vary.