Æ 19mm, weight 2.60 grams.  Uniface.  ENGRAVER  LONDON on ribbon above and below MORING.  Good VF

The 1856 London Post Office Directory lists Thomas Moring, gem, stone & metal engraver, diesinker, copper & steel plate engraver, printer, lever and screw press manufacturer &c. 44 High Holborn.

https://www.exlibris-art.com/thomas-moring/ has the following:

Thomas Moring, a 19th century “die-sinker, gem engraver, heraldic artist and seal engraver” was known to have been active from 1840 to 1900, appearing in records at an address in Lincoln’s Inn Fields and then later in High Holborn. The engraver also seems to have been a prolific ex libris artist and in the early 1900s a collection of his book plates engraved on wood and printed directly from the blocks – One Hundred Book Plates Engraved on Wood by Thomas Moring – was published by the De La More Press, a publisher founded by Alexander Moring in 1895 in London, England and specialising in works on art and literature. The book included an introduction on the art of engraving book plates on wood by Alexander Moring and descriptive notes for all plates.