The "James Crawford" name got me to this post. This nice set of hallmarks are on a table/dessert spoon, 7 3/4 inches long and 45 grams in weight. We can see the 1774 "H" and that mini spiked cartouche lion, discussed earlier, along with the crisp maker mark.
Do we think the pictorial bit of the "IC" mark is a trophy? It looks a bit like a cows head with decorations on its horns to me.
Regarding the Newcastle "London like" cartouche dates, the "silvermakersmarks" web site has the plain rectangular cartouche as an example for 1778 (M). There are not any examples for the years 1775-1777.
Fishless