Hi, I was looking for H & S and looked at every list here starting with "H&" but failed to find "Hotchkiss & Schreuder" because it was filed under "Ho." For us newbies, wondering if cross-indexing under "H&" would be helpful... But your site is...
I have gone through this site's marks plus those of silvercollection.it, with no luck. This spoon/ladle is less than 8 inches long. See the closeup of the mark—I interpret this as M & S (with the M and S in circles and the & in a marquis or diamond shape). Possibly the M could be an H or a W...