Screw-down orientable crown

A method for assembling a screw-down orientable crown (200) for a watch case (100) including a middle part (9) with at least one through housing (90) for receiving said screw-down orientable crown (200), the screw-down orientable crown (200) is arranged to cooperate with said housing (90) and tightly seal it, said screw-down orientable crown (200) including a pattern (19) on an end face (18), said screw-down orientable crown (200) including, a sub-assembly (20) including a crown body (1) that can be manipulated by a user and including said pattern (19), and a tube (11) arranged to be screwed-down or driven into said housing (90) in an axial direction (D), which are axially movable in said axial direction (D) relative to each other, where said sub-assembly (20) includes an indexing relief (15) integral with said crown body (1) extending in said axial direction (D) and arranged, in a coupled position, to complementarily cooperate with a complementary indexing relief (55) that a fixed pipe (5) includes, that said sub-assembly (20) includes and which extends in said axial direction (D) and tends to be pushed back from said crown body (1) by at least one crown spring (12) interposed and captively mounted between said crown body (1) and said fixed pipe (5) that it tends to separate from one another, and arranged, in a position disconnected by compression of said crown spring (12), to remain at an axial distance from said complementary indexing relief (55) and without cooperation therewith, the cooperation between said indexing relief (15) and said complementary indexing relief (55) defining a discrete number of relative indexing positions corresponding to so many relative orientations of said pattern (19) relative to said case (100), said sub-assembly (20) and said tube (11) being arranged to cooperate by screwing-down to an abutment position corresponding to a fully screwed-down position of said sub-assembly (20) in said tube (11), wherein said sub-assembly (20) includes an axial stop means (3) fixed to said crown body (1) to axially trap, in said axial direction (D), said fixed pipe (5) with an axial stroke corresponding to the range of deformation of said crown spring (12) to enable the disconnection, by a compression of said crown body (1), between said indexing relief (15) and said complementary indexing relief (55), and wherein said indexing relief (15) is carried by a trunnion (4) integral with said crown body (1) and which is inside said fixed pipe (5), the comprising the following steps:

• preparing said sub-assembly (20) with said axial stop means (3) in said crown body (1), by inserting said indexing relief (15) into said complementary indexing relief (55), and internally equipping said crown body (1) with at least one gasket (8), and axially stopping said gasket (8) by a second axial stop means (9);
• preparing said tube (11) and screwing it on said sub-assembly (20).