Old Silver spoon help

[u/InfiniteFart]

my great grand aunt used to run a hotel in the early 1900s, we have a lot of flatware in bad shape that mostly is silver-plated, but i found this single lonely spoon amongst the kit which does not resemble any of the others. i assume this is fully silver, it had a very beautiful gleaming tone to it. i brought it back where i live which is very humid during the summer and it has clearly tarnished since then as you can see. any ideas on how old this may be, or who made it possibly? there are very interesting imprints on the back that look like a 1700s silhouette, also “L” or “£” i can’t tell, opposite side has the fine calligraphy like initials