They may be tour...may not.  If the 6 iron has a serial number, then most likely they were a stock set...but you never know.  Only sure way is to setup a return with Titleist Warranty and have them inspect.  You could check under the grip as well and see if the shaft's serial number is there.  Then a call to the manufacture may reveal more scoop.

RC

i cant seem to get a verification of titliest acushnet irons and putter with serial numbers on all irons. so must be custom set. encredible set with black n white leather bag, stamped metal logo on bag. i dont know the yr but have tungsten weights in soles of clubs and say stiff true temper on shafts. can someone help before i purchase tomorrow. love the feel. need to upgrade for my increase in play and performance level. wants 150.00 dollars, thanks, steve.