"She was beautiful, she was." [duplicate]
Just as
- They did all they could, didn't they?
has a tag question (/question tag) appended,
- They did all they could, they did.
has a tag statement (a restatement, perhaps for emphasis but a common style device in say Irish English) appended.
Tag Statement:
A tag statement is an elliptical statement that follows and echoes a main clause statement.
Examples: In English, a subject noun or pronoun followed or preceded by an auxiliary verb as in the following example is a tag statement:
- He made a good showing, did Bill.
[SIL: Glossary of Linguistic Terms]