i've been bitten.. by the watch bug..
My father bought his first watch somewhere in the 60's.. but, working in construction.. the watch had a hard life.. and on some bad day... the crown broke from the winding stem... since then.. the watch had been lying around in a drawer somewhere..
since i succeeded in building 2 watchcases already.. i decided to take things a step further..Restoring the Old VERDAL Type Tour de France to it's former Glory..

this is the beginning.. an old worn down watch..
Upon opening the case i discovered that it had a Swiss ETA movement..also used by high-end marques like Tudor and Invicta.. so..i decided it was worth it..
So.. i measured up the case and the movement.. and drew it in 3D in Alibre design.

For work on such delicate parts.. a new tool was necessary.. a movement holder.. i drew a model in 3D, made DXF files, cut some aluminium, and went into the workshop..

Then i made CB files for the case contours..

the Sunburst milling was done with a parametric program.. in EdingCNC..
#1=0 ;STARTANGLE/WORKANGLE
#2=15.5 ;INNER RADIUS
#3=24 ;OUTER RADIUS
#4=37.75 ;CONE ANGLE
;PREPOSITIONING
G90 G61
T4M6
G00 X0 Y0 Z20
G00 Z2 M3
;CALCULATIONS
#2=[#2+#5009] ;INNER RADIUS+TOOLDIAMETER
#3=[#3+#5009] ;OUTER RADIUS+TOOLDIAMETER
#5=[#3-#2] ;DELTA RADIUS
#6=[360-#4] ;CORRECTED ANGLE
#7=[TAN[#6]*#5] ;Z-DEPTH
WHILE [#1<360]
GOSUB RAMP
#1=[#1+2.5]
ENDWHILE
M2
SUB RAMP
G00 X[COS[#1]*#2] Y[SIN[#1]*#2]
G01 Z0 F500
G01 X[COS[#1]*#3] Y[SIN[#1]*#3] Z#7 F2000
G00 Z2
ENDSUB just a "rampdown" move, repeated at 2.5° intervals..
the case has a screwed back, so i had to make a thread mill to mill the thread in the case

and after hardening it.. i made it from toolsteel 1.2210, i went and cut the thread..

Finally i drilled the lugholes for the bracelet.. and the seat for the winding crown..

The watch has a temporary crown here.. i just ordered the crowns, and a saphire crystal 0.8 mm thick to go on top..
the dialface will also be made new..
This case is made of a piece of Aluminium i had lying around.. just for dimension checks really.. but.. since it turned out rather nicely.. i decided to have it anodized, and i ordered another Movement, same type.. i will make a second watch.. with this case.. the old movement wil get a similar case, made of titanium..i bought some leftover pieces from a company that makes hip joints..