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PATENT MARK (BRITISH)
REGISTRY MARK UK
LOZENGE MARK

Unlike silver items, there is no date letter on silverplate allowing to recognize the date of its manufacture.
For silverplate items the patent's date of registered models may be useful for an approximate dating.
The 'lozenge' mark used between 1842 and 1883 to certify the patent of the models registered by the UK Patent Office allows the identification of day, month and year of their registration.
1842 - 1867
1868 - 1883
patent mark 1868 - 1883
 

registry mark used between
1842 - 1867
registry mark used between
1868 - 1883

TABLE BY YEAR AND MONTH
YEAR  

LETTER
MONTH
  

LETTER

 YEAR  

LETTER
MONTH
  

LETTER
1842 X
January
 C 1868 X
January
 C
1843 H
February
 G 1869 H
February
 G
1844 C
March
 W 1870 C
March
 W
1845 A
April
 H 1871 A
April
 H
1846 I
May
 E 1872 I
May
 E
1847 F
June
 M 1873 F
June
 M
1848 U
July
 I 1874 U
July
 I
1849 S
August
 R 1875 S
August
 R
1850 V
September
 D 1876 V
September
 D
1851 P
October
 B 1877 P
October
 B
1852 D
November
 K 1878 D
November
 K
1853 Y
December
 A 1879 Y
December
 A
1854 J
 
 
 1880 J
 
 
1855 E
 
 
 1881 E
 
 
1856 L
 
 
 1882 L
 
 
1857 K
 
 
 1883 K
 
 
1858 B
 
 
    
 
 
1859 M
 
 
    
 
 
1860 Z
 
 
    
 
 
1861 R
 
 
    
 
 
1862 O
 
 
    
 
 
1863 G
 
 
    
 
 
1864 N
 
 
    
 
 
1866 Q
 
 
    
 
 
1867 T
 
 
    
 
 


1842 - 1867: TABLE BY LETTERS OF YEAR AND MONTH

YEAR
A 1845 O 1862
B 1858 P 1851
C 1844 Q 1866
D 1852 R 1861
E 1855 S 1849
F 1847 T 1867
G 1853 U 1848
H 1843 VEE 1850
I 1846 W 1865
J 1854 X 1842
K 1857 Y 1853
L 1856 Z 1860
M 1859    
N 1864    

MONTH
A December
B October
C January
D September
E May
G February
H April
I July
K November
M June
R August
W March
   
   
 

Exceptions: in 1857 the letter "R" was used during 1-19 of September, during 1860 the letter "K" was used for December.>

Thomas Bradbury & Sons silverplate mark, UK Patent Office registry mark 22 November 1853 Silverplate mark of MARTIN HALL & CO, UK Patent Office registry mark 26 July 1858 Thomas Bradbury & Sons silverplate mark, UK Patent Office registry mark 22 December 1865 Thomas Bradbury & Sons silverplate mark, UK Patent Office registry mark 11 May 1866 Thomas Bradbury & Sons silverplate mark, UK Patent Office registry mark 15 December 1870 Thomas Bradbury & Sons silverplate mark, UK Patent Office registry mark 5 April 1880
1868 - 1883: TABLE BY LETTERS OF YEAR AND MONTH

YEAR
A 1871 X 1868
C 1870 Y 1879
D 1878    
E 1881    
F 1873    
H 1869    
I 1872    
J 1880    
K 1883    
L 1882    
P 1877    
S 1875    
U 1874    
VEE 1876    

MONTH
A December
B October
C January
D September
E May
G February
H April
I July
K November
M June
R August
W March
   
   

Exceptions: 1st-6th of March 1878, "W" was used for the year instead of "D", and "G" was used for the month in place of "W".

Victorian lozenge 1842-1867 Victorian lozenge 1868-1883 Registered Patent 47011, entered in 1886
This patent mark
is dated 23 October 1866:
year 1845 (upper corner "Q")
month October (left corner "B")
day 23 (right corner "23")		 This patent mark
is dated 27 June 1872:
day 27 (upper corner)
month June (lower corner M)
year 1872 (right corner I)		 The patent "Rd 47011"
on an item hallmarked London 1887 (maker Atkin Brothers) belongs to the series of numbers issued in 1886.

From 1884 a numerical identification was attributed to new patent models. The table below reports the first serial numer attributed from 1884 to 1919

YEAR
FIRST

NUMBER
YEAR
FIRST

NUMBER

YEAR
FIRST

NUMBER
YEAR
FIRST

NUMBER

1884 1
1885
 19754 1886 40480
1887
 64520
1888 90483
1889
 116480 1890 141273
1891
 163767
1892 185713
1893
 205240 1894 224720
1895
 246975
1896 268392
1897
 291241 1898 311658
1899
 331707
1900 351202
1901
 368154 1902 385180
1903
 403200
1904 424400
1905
 447800 1906 471860
1907
 493900
1908 518640
1909
 535170 1910 548920
1911
 575817
1912 594195
1913
 612431 1914 630190
1915
 644935
1916 653521
1917
 658988 1918 662872
1919
 666128




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