http://www.jmbullion.com/1-oz-jm-bullion-eagle-silver-round/ Don't look Bad I would pick a couple up. I don't think JM Bullion Bars are related anyway to the JM Bullion website?
No, they're not Johnson Matthey. JM Bullion is a retail arm of Amark, at least that's what I've been told.
JM Bullion is a bullion dealer based in Dallas TX. I believe they also operate silver.com. Johnson Matthey is a chemical company based in the UK that has a metals division to support their product offerings. While they do produce some bullion products as part of their refining operations, their main business is developing practical application utilizing metals. I believe they specialize in PGMs.