These two photos may be a set of the world's first photographs, or at least the oldest surviving photo and the world's oldest original wood frames. These two photos are believed to have been taken by, Joseph Nicéphore Niépce in 1826/1827. Captured using a technique known as heliography. These two photos may also be related to the TV/Radio personality Glen Beck, as the markings on the back are, Ma Beck & Pa Beck.
These two original photos were purchased in the USA. If you need more photos I will return to the storage to take them at your request.
Thank you for your appraisal inquiry with Mearto. The item presented appears to be "crayon portraits." These works are composed of photographs embellished with pastel. The practice was very popular throughout the mid 19th century to the mid 20th century. Unfortunately, without detailed provenance, the items cannot be traced to Glen Beck.
Heliography is a photomechanical reproduction process that would yield multiples of an image. As there does not appear to be other examples of these images found during a reverse image search, these works are more likely crayon portraits. Additionally, Niépce's plates are highly documented and these images do not appear in his oeuvre.
The estimate provided is based on recent auction estimates and results of comparable crayon portraits, dating to the 19th century. The estimate is contingent on a full condition report. Please note asking or dealer prices may vary. Thank you and please take care.