Check out "Strombus oldi - A Retrospective" by Harry Lee.
I don't know if it's still there but I found it a couple of years back at:
http://home.sprynet.com/~wfrank/strombus.htm
Also, Hawaiian Shell News June'77 p.10, pictures a specimen from Mombassa,
Kenya - over 150mm in size.
Winston Barney
Fort Worth, TX
Subject: Seeking citations to literature concerning Strombus oldi. :)