Ok, after DonC did way better than me yesterday at Spanish Banks in very light wind I noticed that his Mikes lab board felt a lot lighter than mine (it couldn't have been skill ).
So I got out my luggage scale which seems pretty accurate and measured two boards, dry but with fins and foot straps attached.
my Aguera 2012 CR 69 with Rista fins: 18.7 lbs Philippes North LTD 2011 with fins: 21.2 lbs (this board has a history of being water logged)