Hi Theresa Here's some info on appraisers, but not specific to maps. But there's one appraiser society which can do referrals. https://library.osu.edu/biclm/appraisals -Danny Daniel S. Dotson Associate Professor Head - Orton Memorial Library of Geology & Gardner Family Map Room Mathematical Sciences Librarian & Science Education Specialist The Ohio State University University Libraries 180 E Orton Hall - Geology Library, 155 S Oval Mall Columbus, OH 43210 614-688-0053 Office http://orcid.org/0000-0002-2033-2622<https://www.scopus.com/redirect.uri?url=http://www.orcid.org/0000-0002-2033-2622&authorId=20435484000&origin=AuthorProfile&orcId=0000-0002-2033-2622&category=orcidLink> [log in to unmask]<mailto:[log in to unmask]> library.osu.edu<http://library.osu.edu> ________________________________ From: Maps-L: Map Librarians, etc. <[log in to unmask]> on behalf of Quill, Theresa Marguerite <[log in to unmask]> Sent: Thursday, July 15, 2021 5:39 PM To: [log in to unmask] <[log in to unmask]> Subject: Map Appraiser Hi all! I know this has been asked before, but I can’t seem to find it in the archives. Does anyone have recommendations for an appraiser for 20th Century maps? We’ve got a donor who needs an official number. TIA! Theresa -- Theresa Quill (she/her/hers) Map and Spatial Data Librarian Liaison to Department of Geography Associate Librarian Herman B Wells Library, E241C Indiana University Bloomington [log in to unmask] Schedule a virtual appointment with Theresa<https://urldefense.com/v3/__https://iub.libcal.com/appointments?u=31864__;!!KGKeukY!mCosTaBNXEJdn0sqH1yJkWAv2TdB-uKqjrvD63ctUWbxdEWa6PS5xxaAN74u1ogT-w$>