Identifying Gas Cylinder

[Andronicus]

I bought an unused Gas Cylinder off ebay from an Italian dealer. That leads me to believe it may be Breda or Berretta. It has no markings. It has many/most/all of the SA features. i.e flat top ring, beveled lug, and others. Definitely NOT Winchester. Does anyone know how to identify the origin of these Italian parts vs SA?

[Orlando]

Breda gas cylinders will be stamped BMB, Beretta will be stamped PB on the tang

[Andronicus]

Breda gas cylinders will be stamped BMB, Beretta will be stamped PB on the tang

Thanks. So that rules out Italian. I ran through one of those "Is it IHC" questionnaires. Doesn't quite seem to fit. So I guess in the end it is likely SA.

[TJT]

If you have access to Larry Babcock's book, he has a section on how to identify the different makers, albeit confusing at best.
Jon