Sertorius Festus Tombstone "sleeves"

[Doc]

Robinson mentions that the tombstone of Sertorius Festus depicts him as having short sleeves with his plumata. When one looks at that tombstone it actually apears that way. But I have been reading and speaking to some other reenactors and I was told that what is depicted is not a sleeve because plumata like hamata in the first century AD did not have sleeves :? Rather the chainmail (or scale mail) would just hang over the shoulder giving the appearence of a sleeve.

Is this true or not. :?: I see most reenactors with their sqaumatas sleeveless and their hamatas sleevless. Sometimes I see the squamata with a Bishop's mantle.

Any help would be appreciated.

Thanks

Paolo