Casio G-SHOCK Ref. 6900 by John Mayer | HODINKEE,John Mayer Is Back With Another G-Shock Collab | GQ,Casio G-SHOCK Ref. 6900 by John Mayer | HODINKEE,A third and final John Mayer x Hodinkee x G-Shock collaboration (DW6900JM22-2 ) is launching today (December 13) - G-Central G-Shock Fan Site,G-SHOCK Ref. 6900 By John Mayer – HODINKEE Shop,