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Steingutfabrik Franz Anton Mehlem / Steingut-Fabrik und Kunsttöpferei F.A. Mehlem, Inhaber Franz Guilleaume 
"Royal Bonn"
Coblenzerstraße 81,  Bonn. North Rhine-Westphalia.
Hersteller / Manufacturer.
Mehlem's new factory was founded in 1840. "Royal Bonn" trade mark was used from 1890 - 1920.

Franz Guilleaume born 20th September 1848, in Köln - died on 3rd January 1914, in Bonn.
 The business was purchased by
Villeroy & Boch in 1920. The factory was closed in 1931.
Reference:
Porcelain Marks & More   Bonn Adressbuch 1902  Other Addressbooks  
More Addressbooks

Steingutfabrik Franz Anton Mehlem / Steingut-Fabrik und Kunsttöpferei F.A. Mehlem, Inh. F. Guilleaume -
Stein shown complete with marks immediately underneath.

Steingutfabrik Franz Anton Mehlem / Steingut-Fabrik und Kunsttöpferei F.A. Mehlem, Inh. F. Guilleaume -
Impressed roundel mark, plus ink stamped tower mark, 
together with decoration number & decorator signature.

Steingutfabrik Franz Anton Mehlem - Royal Bonn 2
Impressed roundel mark, dated circa 1870 - 1920

Steingutfabrik Franz Anton Mehlem - Royal Bonn 3
Handwritten ink mark, "Royal Bonn, Delft", 
dated 1890 - 1920.



Steingutfabrik Franz Anton Mehlem / Steingut-Fabrik und Kunsttöpferei F.A. Mehlem, Inh. F. Guilleaume -
Impressed roundel mark, dated circa 1870 - 1920

Steingutfabrik Franz Anton Mehlem 4
Ink stamp tower mark, dated circa 1885 - 1920.

Steingutfabrik Franz Anton Mehlem 000001
Ink stamp mark,"Crown & shield", plus impressed roundel, dated circa 1890 - 1920. 
Steingutfabrik Franz Anton Mehlem 13-11-11-1
Blue and White "Delft" stein

Steingutfabrik Franz Anton Mehlem 13-11-11-2
Handwritten ink mark on the above Blue & White,
 "Royal Bonn, Delft", dated 1890 - 1920.


Steingutfabrik Franz Anton Mehlem / Steingut-Fabrik und Kunsttöpferei F.A. Mehlem, Inhaber Franz Guilleaume 13-9-17-2
A strong Jugendstil influenced design.

Steingutfabrik Franz Anton Mehlem / Steingut-Fabrik und Kunsttöpferei F.A. Mehlem, Inhaber Franz Guilleaume 13-9-17-1
Basemarks on the featured Jugendstil stein above.

Steingutfabrik Franz Anton Mehlem - Royal Bonn 6
Handwritten "Royal Bonn, Delft", dated 1890 - 1920.
Ink stamp,"Crown & shield", dated circa 1890 - 1920.
Ink stamp mark "Triangle" dates unknown.

Steingutfabrik Franz Anton Mehlem -
Handwritten ink mark, "Royal Bonn, Delft", 
dated 1890 - 1920, plus impressed roundel mark.

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