The sender gives on the back of the card in one of the last lines still the reference to Shavuot - " It was high time"

Shavout 5681 was on June 12, 1921 - three days before the scribe wrote the card.

In the Jewish address book Frankfurt a. M. 1935 the following entries can be found

List of names - Ettlinger Emil, embroidery factory, Neckarstraße 5   -  Ettlinger Rudolf, handicrafts factory, Neckarstraße 13

Industry -  Enterprises - Ettlinger Rudolf, Handarbeitenfabrik, Neckarstraße 13 - (Page 171)

In the Jewish address book of the city of Frankfurt 1935 ( The 1935 Jewish Frankfurt Addressbook ) is the following entry  -  Carlebach Max, Kfm., Glauburgstr. ~7.

In 1882, the Jewish merchant Julius Oppenheim bought the property at Lützowstraße 16. He owned other properties on the corner of Potsdamer Straße and gave part of the site to the Jewish community shortly before 1896. The community had the tenements there demolished and built a typical synagogue center with residential and school buildings facing the street and a synagogue in the backyard. With its red brick facade, the ensemble resembled the church buildings that were being built at the time. In the house, Jews prayed according to the liberal rite, that is, with organ accompaniment.

Dating from 1553, this is Kraków's smallest but most active synagogue, with Shabbat services once again taking place here each Friday following the recent completion of restoration works. The synagogue was established by the family of the famous 16th century Polish rabbi Moses Isserles - better known as 'the Rema,' based on a Hebrew acronym, and is unique for the proximity of the Old Jewish Cemetery adjacent to it.