Read the stamp
JM jewelry mark
JM jewelry mark examples include Johnson, Matthey & Co., Inc.; a mark from New York NY, United States is dated 1943.
Related marks
16 marks
JM mark examples
16 illustrated marks match the JM letter group, including records for G.L. Melaerts, J. Mandersloot, J. Mehrlust. Open an example to compare its full mark and maker timeline.
Compare the complete mark
Check whether the letters touch, share a stroke or sit in separate punches. The surrounding border and any accompanying number or emblem help separate otherwise similar initials.