Old book and film numbers at the FamilySearch Library

The old GS (Genealogical Society) film numbers refer to a former catalog numbering system. They were five-digit numbers followed by a one- to four-digit part number. Here are several ways to convert the old GS film numbers into the current Family History Library film numbers.


 * Use the "Old microfilm number conversion" charts in this wiki.
 * Search the The Family History Library Catalog by the locality or author of the record on the film.
 * Consult, Church of Jesus Christ of Latter-day Saints, Genealogical Society, Library Division. Available on fiche.
 * Use the old CD version of the catalog in the DOS version of FamilySearch. This version is available in the Family History Library in Salt Lake City and may be available in a family history center near you. The center staff can help you convert the number.

If you need to convert an old GS book number, consult one of these resources, most of which are available on film or fiche.


 * Changed call numbers, Great Britain. Church of Jesus Christ of Latter-day Saints. Genealogical Society. Library Division.
 * Changed numbers of American publications and United States. Church of Jesus Christ of Latter-day Saints. Genealogical Society. Library Division.
 * Changed numbers of Latin America, Spain and Portugal. Church of Jesus Christ of Latter-day Saints. Genealogical Society. Library Division.
 * Changes of family history "A" group call numbers. Church of Jesus Christ of Latter-day Saints. Genealogical Society. Library Division.
 * Changes of family history "B" group call numbers. Church of Jesus Christ of Latter-day Saints. Genealogical Society. Library Division.
 * Contact the Family History Library.