According to this article it was in the basement of the Bermuda Building (https://www.sfgate.com/tech/article/bell-labs-larry-luckham-techie-women-photos-135786

According to this article it was in the basement of the Bermuda Building (https://www.sfgate.com/tech/article/bell-labs-larry-luckham-techie-women-photos-13578683.php https://www.sfgate.com/tech/article/bell-labs-larry-luckham-...) which was demolished after Loma Prieta damaged it (https://localwiki.org/oakland/Bermuda_Building https://localwiki.org/oakland/Bermuda_Building).