Would not be the date made !! They could not have marked each piece manufactured with the date made,, would have been too costly !! Not very many with that name !! Will look more tomorrow !!
Definitely some misunderstanding here haha. Sorry.
The company you are talking about didn't become a company until 1899.
I understand the date on this piece might not be the date it was made, but if anything it would be the date the company was founded...and 1886 is 13 years before that company was even founded. That's all I was saying
And unfortunately there were quite a few companies with the initials ARM (including farming equipment companies, steel companies, and mining companies which all could have used something similar) so it makes things pretty tricky.
Fun to research though when it's a hard one!