Compare 1 source-linked mark variant recorded under J M & Co. These are reconstructions for comparison, not source photographs or authentication evidence.
The two initials, central outlined ampersand, following capital, final small rounded glyph, and long capsule border preserve the source order; ampersand counters are retained.
Maker labels and date or location statements follow the cited source records. Similar names across source collections have not been merged. Compare the photographed mark and the complete object before relying on a resemblance.