Belleek Marks Page 2

Diamond Marks

 

How to interpret a diamond mark
Diamond marks included a letter code to represent the year the design was registered. By the end of 1867 the alphabet had been used in full and the diamond mark had to be altered to avoid repetition.
This means that the letters and numbers used to represent dates are at different points of the diamond between 1842-1867 and 1868-1883.
The mark at the top of the diamond was a Roman numeral representing the material the item was made from. These did not change position.
Use the examples below to work out which date range corresponds to the diamond mark on your item.
For example, if you have a letter in the left point of the diamond and a number on the right, then it falls into the 1842-1867 range. If the number is on the left and the letter on the right it is in the 1868-1883 range.


Use the tables below to work out what the codes represent for the date and the class of material.
diamond mark


Diamond mark month codes

Month code

Month

 

Month code

Month

A

December

 

H

April

B

October

 

I

July

C

January

 

K

November

D

September

 

M

June

E

May

 

R

August

G

February

 

W

March

*R was used during 1-19 September 1857
*K was used for December 1860
*G was used for the month in place of W 1-6 March 1878


Diamond mark year codes

Year codes for 1842-1867 in alphabetical order


Year codes

 

Year codes

 

Year codes

A

1845

 

J

1854

 

S

1849

B

1858

 

K

1857

 

T

1867

C

1844

 

L

1856

 

U

1848

D

1852

 

M

1859

 

V

1850

E

1855

 

N

1864

 

W

1865

F

1847

 

O

1862

 

X

1842

G

1863

 

P

1851

 

Y

1853

H

1843

 

Q

1866

 

Z

1860

I

1846

 

R

1861

Year codes for 1868-1883 in alphabetical order


Year codes

 

Year codes

A

1871

 

L

1882

C

1870

 

P

1877

D

1878*

 

S

1875

E

1881

 

U

1874

F

1873

 

V

1876

H

1869

 

W

1878

I

1872

 

X

1868

J

1880

 

Y

1879

K

1883

 

 

 

*From 1-6 March 1878, W was used for the year in place of D


Codes listed chronologically


Year codes

 

Year codes

 

Year codes

 

Year codes

1842

X

 

1855

E

 

1868

X

 

1881

E

1843

H

 

1856

L

 

1869

H

 

1882

L

1844

C

 

1857

K

 

1870

C

 

1883

K

1845

A

 

1858

B

 

1871

A

 

 

1846

I

 

1859

M

 

1872

I

 

 

1847

F

 

1860

Z

 

1873

F

 

 

1848

U

 

1861

R

 

1874

U

 

 

1849

S

 

1862

O

 

1875

S

 

 

1850

V

 

1863

G

 

1876

V

 

 

1851

P

 

1864

N

 

1877

P

 

 

1852

D

 

1865

W

 

1878

D*

 

 

1853

Y

 

1866

Q

 

1879

Y

 

 

1854

J

 

1867

T

 

1880

J

 

 

*From 1-6 March 1878, W was used for the year in place of D.


Material classes
I   Metal
II   Wood
III   Glass
IV   Ceramic
V   Wallpaper
VI  Carpets
VII-XIII   Textiles of various kinds, including dress and furnishing fabrics

Please email me for further details.

ian @ onlybelleek.com