Brian «BigBass» Gardner

Mastering engineer at Trident Studio, London and subsequently operating at Allen Zentz Mastering, Hollywood and at Bernie Grundman Mastering, Hollywood (1984–2015). He's the owner of Brian Gardner Mastering. Often referred to as "Big Bass".
The inscribed flower and bird motifs in the deadwax to the right of AZ are of mastering and cutting engineer Brian Gardner. In these cases, please use in credits section:
Lacquer Cut By [Runout Etching ❀] - Brian Gardner or
Lacquer Cut By [Runout Etching ⁀⁀ ⁀⁀] - Brian Gardner
Lacquer Cut By [Runout Etching ⁀⁀︵︵] - Brian Gardner
Not to be confused with Mastered by [Runout Etching ⁀⁀] = Mark Reveley
Also, his etching can appear as his initials followed by the seagulls (see image).