PARTS LIST
Cal. 4R15A/4R15B/4R16A/4R16B
3/19
Since the size of the movement for A series and B series is same, the complete movement of B
series can be assembled into the watches which originally had the A series movement; however,
as not all parts are covertible, please use the appropriate parts for each caliber.
PARTS DIFFERENCES BETWEEN A SERIES AND B SERIES
PARTS NAME
4R15A
4R16A
4R15B
4R16B
5
DATE DISK GUARD SCREW B
0016705
0012354
6
DATE DISK GUARD
0808300
0808310
7
DATE DISK (4R15) *
0878270
-
0878208
-
7
DATE DISK (4R15) *
0878271
-
0878209
-
7
DATE DISK (4R15) *
0878274
-
0148054
-
7
DATE DISK (4R16) *
-
0878280
-
0878206
7
DATE DISK (4R16) *
-
0878281
-
0878207
8
DATE JUMPER
0810030
0810183
9
CALENDAR CORRECTOR SLIDNG
INTERMEDIATE WHEEL
0737300
0737183
10
HOUR WHEEL
0271483
0273183
12
DATE DRIVING WHEEL
0802300
0802183
13
MINUTE WHEEL
0267006
0261183
16
LOWER BRIDGE FOR THIRD WHEEL
0436300
0436183
20
OSCILLATING WEIGHT
0509217
0509214
0509369
0509367
35
BARREL AND TRAIN WHEEL
BRIDGE
0112388
0114178
37
PAWL LEVER
0831077
0831183
45
BARREL COMPLETE (WITH MAIN-
SPRING)
0201267
0201164
50
CENTER WHEEL WITH CANNON
PINIONMAIN PLATE
0224086
0224183
54
SETTING LEVER
0383070
0383178
55
CLUTCH WHEEL
0282070
0282183
58
MAIN PLATE
0100326
0104181
* These parts are determined based on the design of watches, such as hands height, dial color,
and design of cases. Please refer to the SEIKO WATCH PARTS CATALOGUE in order to choose
corresponding parts.
