Schützenstraße 11a, 14a & 22/24, Emserstraße 11/13, Rheinstraße 32a, Höhr, Hesse-Nassau, Prussia. (now Höhr-Grenzhausen, Rhineland-Palatinate).
Steinzeug- und Glaswaren sowie Zinngiesserei / Stoneware manufacturer & glassware wholesaler as well as pewterer.
Peter Eckhardt & Ernst Johann Engler founded the company in 1898 as a wholesaler. In 1907 they took over the marketing of the products made by Roßkopf und Gerz. In 1914 they purchased a small company with a kiln and in 1918 they purchased some moulds from Roßkopf und Gerz, who had been made bankrupt by that time. So they became manufacturers and employed twelve pewtersmiths and twelve painters. In addition to some of the Roßkopf & Gerz moulds, they purchased designs from some well known Jugendstil designers of the day, such as Albin Müller, Leonhard Hellmuth, Karl Görig and Bruno Mauder, plus they generated many other designs in-house. In 1923 they purchased the balance of the Roßkopf und Gerz moulds. The company continued to trade until 1971, at which time some of their moulds were purchased by Werner Corzelius.
Reference: Character Steins Twisted vine handles Westerwald Adressbuch MySteinCollection
Eckhardt & Engler #550, ex Roßkopf und Gerz #550 mould, 
Impressed mark, without the surrounding oval, on featured stein immediately above. It is unusual having Impressed and inked "Made in Germany" plus "Made in Western Germany" ink stamp.
Impressed mark supposedly 1918 - 1971, which can be accompanied by either impressed "Made in Germany" (pre 1949) or "Western Germany" (post 1949) markings, in spite of Höhr combining with Grenzhausen in 1936. 
Impressed mark supposedly 1918 - 1971, which can be accompanied by either impressed "Made in Germany" (pre 1949) or "Western Germany" (post 1949) markings, in spite of Höhr combining with Grenzhausen in 1936. This design #1403 was generated by Eckhardt & Engler & not by Roßkopf & Gerz. 
An advertisement from Führer durch Höhr, dated 1907 
Advertisement in the 1921 Westerwald address book 
Impressed mark, post 1936, complete with the ink stamp mark of the pewterer (Zinngießerei), Max Rackl of Munich, who closed c.1940 
Impressed mark, post 1936, complete with the ink stamp mark of the pewterer (Zinngießerei), Max Rackl of Munich, who closed c.1940. 
Impressed mark supposedly 1918 - 1971, accompanied by an impressed "Made in Germany" (pre 1949) marking. This was taken from stein mould No. 455 (ex Roßkopf & Gerz #455. RuG steins are numbered as high as #939) 
Eckhardt & Engler #424, ex Roßkopf und Gerz #424 mould. 
Basemarks on the featured Eckhardt & Engler #424, immediately above. The E&E marks do not have their normal surrounding oval. The "Germany" is also slightly curved. This was taken from character stein mould No. 424 (ex Roßkopf & Gerz #424 Brewer. RuG steins are numbered as high as #939) Supposedly steins with the number 17 are an early (older) Eckhardt & Engler version. 
Yet another impressed mark supposedly 1918 - 1971, accompanied by an impressed "Western Germany" (post 1949) marking, in spite of Höhr combining with Grenzhausen in 1936. 
Impressed mark supposedly 1918 - 1971, which can be accompanied by either impressed "Made in Germany" (pre 1949) or "Western Germany" (post 1949) markings, in spite of Höhr combining with Grenzhausen in 1936. This design #1431 was generated by Eckhardt & Engler & not by Roßkopf & Gerz. 