A SMALL COLLECTION OF ANTIQUE SILVER
AND OBJECTS OF VERTU
THE WHAT IS? SILVER DICTIONARY

LOZENGE MARK
PATENT MARK (BRITISH)

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
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
 
 
   
 
 

Victorian lozenge 1842-1867
This patent mark
is dated 23 October 1845:
year 1845 (upper corner "a")
month October (left corner "B")
day 23 (right corner "23")
Victorian lozenge 1868-1883
This patent mark
is dated 27 June 1872:
day 27 (upper corner)
month June (lower corner M)
year 1872 (right corner I)
Registered Patent 47011, entered in 1886
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 3662872
1919
666128
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