Case for a timepiece

A case for a timepiece, said case including a middle part for receiving at least one movement surmounted by a dial, said dial directly or indirectly carrying an upper sub-assembly or a crystal in proximity to an upper portion of said middle part or a bezel fixed to said middle part, and said case further including a back cover cooperating with said middle part in proximity to a lower portion of said middle part opposite to said upper portion, wherein said middle part includes a device for the removal or adjustment of said upper sub-assembly or of said crystal, said removal device including a plurality of pushers each movable in relation to said middle part in a sink comprised in said middle part, parallel to an axial direction of assembly/disassembly of the components of said timepiece, to transmit directly or indirectly via a push plate comprised in said case, only to said dial a force applied to each said pusher in said axial direction from said lower portion, said force being transmitted by said dial to said upper sub-assembly or to said crystal.