Simple answer is I dont know. I dont recall the 102 at all, but I do have a brain the size of a pea (and its getting smaller as the years march onward - I wonder if the later 101's with the round ARC tweeters became the 102's - Can you post up some pictures?
Ta da
My present 102s
my old 101s
my old 050s
From Russ Andrews info page
He also started working for ARC developing loudspeakers, a relationship that lasted until the mid-eighties. Russ was involved in the ARC 101 then 102, 103, 050 and is particularly proud of his work on ARC 801 where he and Alistair Clarke (formerly of Mordant Short) designed and made the drive units themselves.