ZENITH 4021

Exploded diagram

BrandZENITHCaliber4021Size13 1/4FunctionSC-KLS-Gangres.-AUT-CHRVersionEL PRIMEROHandsStem5824Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)1.22x12.5x0.146 AUTMainspring (subs.)Battery

Watchparts

Part NocaliberdescriptionoriginalArtno.
100BMain plate jewelled51.52.1210.4021995001004021
106BBarrel and train wheel bridge51.03.0575.4021995001064021
116BEscape wheel bridge51.12.0110.400995001164021
121/3BBalance bridge51.06.0610.400995001214021
125BPallet bridge51.07.0360.400995001254021
180/2BBarrel with drum + cover52.63.0120.4011995001804021
205= 400Center wheel drilled + cannon99500205400
206BCenter wheel drilled without cannon53.70.0081.40099500206400
210= 400Third wheel53.73.0110.40099500210400
225BSweep second wheel53.74.0720.410995002254021
245= 410Cannon pignon sweep sec. H = 27009.72.0210.410995002454021
255BHour wheel sweep sec.09.37.0355.4021995002554021
260= 400Minute wheel59.39.0085.40399500260400
292BDriving wheel arbor09.43.0010.403995002924021
407= 400Clutch wheel08.24.0070.40099500407400
410= 400Winding pignon07.25.0070.40099500410400
414= 400crown wheel seating12.46.0080.40099500414400
416= 400Ratchet wheel lower07.51.0070.40099500416400
421= 400Crown wheel lower07.47.0085.40099500421400
422= 400Crown wheel ring12.49.0070.40099500422400
423= 400Crown wheel core12.48.0050.40099500423400
425= 400Clicking spring07.52.0060.40099500425400
430= 400Click spring13.53.0070.40099500430400
435BYoke spring08.28.0140.403995004354021
440= 400Yoke spring13.29.0080.40099500435400
443= 403Setting lever58.27.0150.40399500443403
443BSetting lever assembled08.27.0150.403995004434021
445/1= 400Setting lever spring10.30.0075.40099500445400
450BSetting wheel09.41.0080.400.RETOUCH995004504021
451= 400Setting wheel for minute wheel09.41.0070.40099500451400
462= 400Minute train bridge10.32.0035.40099500462400
499BHour wheel friction spring13.01.2030.STAN995004994021
502= 400Stellhebelwelle08.26.0070.40099500502400
705BEscape wheel -pinion straigt piv.53.08.0870.STAN995007054021
705= 400ZEscape wheel - 20 teeth53.76.0390.40099500705400Z
710BPallet fork -pinion 1 lower end-piec.54.79.0480.STAN995007104021
710= 400ZPallet fork54.79.0260.40099500710400Z
721= 400Balance cplt. -regulated56.80.0101.40099500721400
934= 400push-piece bolt10.15.0010.40099500934400
953/2= 400Extension pusher long48.05.0025.40099500953400
953/4= 400Extension pusher48.05.0015.40099500953400
1481= 400Reduction wheel AUT97.95.0035.40399501481400
1482= 400Ratchet wheel driving wheel97.45.0030.40099501482400
1488= 400Pawel winding wheel97.02.0010.40099501488400
1499= 400Reverser connecting wheel97.59.0010.40099501499400
1525= 400Reduction wheel bolt10.74.0020.40099501525400
5106= 403screw for barrel train brigde11.13.9902.40399505106403
5121= 403screw for balance cock11.13.9892.40399505121403
51525= 403screw for reduction gear bolt11.14.9972.40399551525403
52535Bscrew for date indication11.40.9926.660995525354021
52551= 410screw for date mechanism plate11.43.9986.41099552551410
5423= 400screw for crown wheel core11.33.9982.40399505423400
5425= 400srew for click11.11.9962.40399505425400
5435= 400screw for spring yoke10.53.9700.40099505435400
5440= 400screw for yoke spring11.63.9756.40099505440400
5462= 400screw for minute train bridge11.42.9946.40099505462400
58070= 403screw for pillar wheel11.42.9922.40399558070403
58140= 403screw for operating lever11.63.9722.40399558140403
58200= 403screw for blocking lever11.63.9812.40399558200403
58270= 403screw for minute recording jumper11.11.9762.40399558270403
58290= 403screw for friction spring11.11.9782.40399558290403
58320= 403screw for clutch spring11.63.9762.40399558320403
58325= 403screw for maintain pin11.63.9732.40399558325403
58335= 403screw for operating lever spring11.13.9882.40399558335403
58350= 403screw for hammer spring11.37.9962.40399558350403
58500= 403screw for chrono bridge11.11.9922.40399558500403
59602/1Bscrew11.22.9830.STAN995596204021
59602/2BSchraube f. Differenzialbrücke11.22.9830.STAN995596024021
8000BChronograph wheel ( 60s)98.10.0310.4021995080004021
8020BMinute counting wheel (30m)98.11.0070.410995080204021
8060= 400Driving wheel chrono62.13.0015.40399508060400
8070= 400Pillar wheel 2-3 functions48.06.0010.40099508070400
8080BCoubling clutch, mounted, 2 functions995080804021
8080= 403Coubling clutch, mounted, 2 functions68.52.0015.40399508080400
8100= 410Sliding gear (30m), mounted99508100410
8100= 403Sliding gear (30m), mounted98.71.0012.40399508100400
8140BOperating lever chrono, 2 funct.995081404021
8140= 403Operating lever chrono, 2 funct.98.30.0025.40399508140403
8157BDeckplatte für Schalthebelhaken995081574021
8157= 403guard25.10.0015.40399508157403
8180= 400Fly-back lever -zero actoon98.48.0020.40099508180400
8200BBlocking lever, 2 functions98.49.0050.400995082004021
8220B = 403Hammer, mounted, 2 functions995082204021
8220= 403Hammer, mounted, 2 functions98.44.0026.40399508220403
8270= 400Minute counter jumper98.50.0011.40399508270400
8290= 400Chronograph wheel friction13.66.0020.40099508290400
8320= 400Clutch spring, 2 functions13.33.0011.40099508320400
8325= 400Sliding gear spring13.34.0015.40099508325400
8335BOperating lever spring48.32.0015.403995083354021
8335= 403Operating lever spring48.32.0015.40399508335403
8345= 400Blockierhebelfeder13.35.0020.40099508345400
8350BHammer spring, 2 functions995083504021
8350= 407Hammer spring, 2 functions98.46.0030.40799508350407
8355BPillar wheel jumper48.52.0030.400995083554021
8358= 400Pillar wheel jumper sole48.51.0010.40099508358400
8400= 400Eccentric f. pivoting of coupling clutch05.10.0020.40099508400400
8401= 400Banking eccentric f. couplimg clutch05.10.0030.40099508401400
8406= 400Finger-depth eccentric05.10.0040.40099508406400
8500BChronograph bridge51.25.0341.4021995085004021
8600BHour counting wheel, mounted995086004021
9501BPinion59.27.0030.4021995095014021
9502BIntermediate wheel59.21.0030.4021995095024021
9503BSetting wheel62.10.0200.4011995095034021
9504BDriving wheel for indicator wheel09.42.0100.4011995095044021
9507BReduction wheel59.24.0060.4021995095074021
9538= 4021Display driving wheel62.10.0435.4021995095384021
9550/1= 635Differential gear15.37.0020.63599509550635
9550/2= 635Differential15.38.0050.63599509550636
9550/3= 635Differential cage15.36.0020.63599509550637
9550/4= 635Differential crown15.35.0020.63599509550638
9550/5= 635Differential crown15.39.0040.63599509550639
9602/1BMaintaining plate10.96.0080.4021995096024021
9602/2BDifferential bridge10.97.0040.4021995096024022
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