Hi,
Welcome to the Forum.
This Leopard's Head, dubbing by some as the 'grinning monkey' was the work of the engraver John Smith. Smith was employed by the Goldsmiths Company from 1815-1839. His work was below the standard expected by the Company, and he was known to have failing eyesight. He also made other errors, most famously in 1833. If you look at any table of date marks for that year, you will notice an upper case 'S' was used in the sequence of lower case letters. Smith handed over the punches on the day that the new Wardens took over, and although the mistake was noticed straight away, there was no time to do anything about it.
I suspect John Smith was a well-liked character, for despite the quality of his work, following the debacle of 1833, he still managed to cling on to his job until 1839. At that date John Smith and William Wyon, the engraver at the Royal Mint, were both commisioned to make sample punches of the Duty Mark. The comparison showed Wyon's work to be far superior and he was appointed as Engraver to the Company, a position he held until his death in 1851. John Smith was reported to have been awarded a generous pension.
The number '7' looks to me to be a journeyman's mark.
See 'Tally Mark' at:
http://www.925-1000.com/silverglossary5.htmlTrev.
.