The archive of the Portuguese Jewish Community of Amsterdam has come online. Michael Waas broke the news a few days ago here. It seems to have escaped the attention of many that now a few primary genealogical sources are also online: registers of birth, of burials, and, maybe most importantly, all the Ketubot of the Sephardic Jews of Amsterdam. All the Ketubot are in Hebrew, They are all signed by the groom. Signatures are mostly in Latin letters, but there are quite a a few Hebrew signatures as well.Follow the link, and click your way through to this primary source, following the image I enclose. https://archief.amsterdam/inventarissen/inventaris/334.nl.html You can use the index on Dutchjewry. org, to find a marriage and a ketuba that you may want to consult (and download!). The index, unfortunately does not give a page- or a scannumber. You will have to do a bit of searchwork on your own, but there is an index in many of the Ketuba books themselves, either up front or at the end, which will give you a pagenumber. Here is the link to the index. http://www.dutchjewry.org/phpr/amsterdam/port_isr_gem_marriages/amsterdam_port_isr_gem_marriages_list.php