Many, many thanks! Not only for clarifying the meaning of that middle hallmark with the letter "M" (not W!), but also for referring me to what looks like it could be a very useful source for future research. Two questions:
1) since Albert Coles is the silversmith I'm most familiar with, I used a search for him as my test case. No Albert Coles! Any idea why, since AC were one of the largest producers of silver folding fruit knives in the 19th century?
2) I've read that somewhere around the mid-1800's (1864?), American silversmiths adapted the British .925/1000 sterling standard. If Morgan Morgans acquired AC in 1877, and there is no stamp of "Sterling" on this knife, can you draw the inference that it is made of coin silver, instead?