Should the crown of the Les Historiques chronograph be hallmarked?

Dear Loungers, I recently sent in my Les Historiques chronograph for servicing. One of the items in the quotation was to replace the crown, with the note that the current crown is not hallmarked. That being said, the crown does looks correct and identical to those I've seen on other Les Historique watches. Can anyone tell me if a non-hallmarked crown is kosher? I don't want to replace the crown if it's not necessary. Thank you.

the Maltese Cross started appearing on the crowns in the mid
06/04/2013 - 11:13
1990s so depending on the date of production of your watch it could have been made without the cross. 
Mine is hallmarked
06/04/2013 - 17:46
But I have a later model ref. 47101-47111/4.  Alex has already introduced the possibility of an unsigned crown depending on when your watch was made. Maybe you should ask VC to confirm 100% with the Heritage Department what is correct for the ref. and year of your Chronograph.  It is definitely worth double checking with them what is absolutely correct for your specific piece.  Also ask if they are suggesting to change the crown for performance reasons or to correct the crown. Good luck, SJX. All the best, Robert 
Thanks for the responses guys.
06/04/2013 - 18:10
Only after reading your posts did I realise that the service estimate meant a Maltese cross logo on the crown - I thought they meant the crown had no assay mark (hallmark) and so was not precious metal. Thanks for the input guys.