Contents of paper binder, quaintly dated? (4)

I believe the answer is:

olde

'quaintly dated?' is the definition.
(as in olde worlde)

'contents of paper binder' is the wordplay.
'contents of' indicates the central letters (letters inside the word).
'paper binder' becomes 'folder' (binder for documents).
The middle letters of 'folder' are 'OLDE'.

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app