ID needed for eyewear

hello, just curious what model/make these are?
they look like OP to me, but i am by no means an expert.
please help. thanks in advance.

http://upload.wikimedia.org/wikipedia/commons/0/00/David_Mamet_2_by_David_Shankbone.JPG

sorry to be a pest, but does anyone have any idea?
they look like OP o'malley but there are some slight differences which leads me to believe they may be another brand's model all-together.
please help if you are knowledgeable in eyewear.
i would greatly appreciate it.