Factory and Movement Codes - saskwatch

Many factories marked watches and movements with a code. Although lists have been compiled, none is complete. In an attempt to create as thorough a list as possible, I have combined them and added what I have learned from my own experience.

Most of the codes appear on movements, but some are found on dials or casebacks.

Codes and factories in italics appear on lists, but I haven’t seen them on a watch.

With a few exceptions, most notably Zhengzhou Watch Factory, a code with a Z in it is for a tongji (standard movement). Usually, simplified tongjis and non-tongjis don’t have a Z. Codes beginning with D, with the exception of DG, are quartz movements.

Often these codes had numbers and/or letters after them. Their meanings are not uniform, and the movement designations became even less uniform as time went by. There is some variation from factory to factory, but they usually follow these rules. A number following a factory code usually referred to a type of movement, and generally the numbers run in chronological order. For example, the ST5 was developed before the ST6. Letters following a code:

A = manual, no calendar

B = manual, calendar

C or D = automatic

G = gaijin (improved)

H = ?

K = kuaibai (fast beat), usually 21600 bph

R = rili (calendar)

Z = ?


3S           Shanghai No. 3 Watch Factory

3SZ        Shanghai No. 3 Watch Factory

AH 2J2  Hefei Watch Factory/Shanghai No. 2 Watch Factory*

B            Shanghai Watch Factory/Shanghai No. 4 Watch Factory/Shanghai Diamond Watch Factory*

BJ         Beijing Watch Factory

BS         Beijing Watch Factory

CSZ       Changshu Watch Factory

DBSE    Shanghai No. 2 Watch Factory

DG        Dixmont Guangzhou Watch Company

DSE      Shanghai No. 2 Watch Factory

DSH     Shanghai Watch Factory

DST     Tianjin Clock and Watch Factory

DSZ     Shanghai Watch Factory

NSH    Shanghai Watch Factory

OSH    Shanghai Watch Factory

JHB     Shanghai Watch Factory/Shanghai Seventh Watch Factory*

JSW    Shanghai No. 5 Watch Factory


SB       Beijing Watch Factory/Suzhou Watch Factory*

SB       Shanghai Watch Factory/Shanghai No. 4 Watch Factory/Shanghai Diamond Watch Factory*

SD2    Shanghai Ballpoint Pen Factory/Shanghai Sixth Watch Factory*

SG      Guangzhou Watch Factory

SHI     Hongqi Watch Factory (Xian)*

SHY    Hengyang Watch Factory

SHZ    Hongqi Watch Factory (Xian)

SH19  Shanghai Watch Factory (SHI9?)

SJ       Jilin Watch Factory

SJY    Jieyang Watch Factory

SL       Liaoning Watch Factory

SL5     Dandong City No. 5 Watch Factory

SM      Shanghai Stopwatch Factory/Shanghai No. 4 Watch Factory/Shanghai Diamond Watch Factory*

SN       Nanjing Watch Factory

SNZ     Zhengzhou Watch Factory

SS        Shanghai Watch Factory*

ST        Tianjin Watch Factory

STZ      Tianjin Clock and Watch Factory

SYZ      Yangzhou Watch Factory

SZ         an early designation for tongji from a number of factories, usually SZ1 or SZ-1

SZB       Beijing Watch Factory/Bengbu Watch Factory*

SZD      Suzhou Watch Factory

SZH      Wuxi Clock and Watch Factory?*

SZ1Z    Zhengzhou Watch Factory (SZIZ?)

SZL      Liaoning Watch Factory

SZN     Nanchang Watch Factory

SZR     Suzhou Watch Factory


ZB        Beijing Watch Factory/Bengbu Watch Factory*

ZBE      Beijing No. 2 Watch Factory

ZBH     Nantong Watch Factory

ZBJ      Beijing Watch Factory

ZCQ      Chongqing Watch Factory

ZCS      Changsha Watch Factory

ZCSH   Shanghai Watch Factory

ZDD     Dandong?

ZDL      Dalian Watch Factory

ZFL      Fenglei Instruments Factory (Xian)

ZGZ     Guangzhou Watch Factory

ZHD     Hudie Watch Factory (Xian)

ZHE     Harbin Watch Factory

ZHF     Hefei Watch Factory

ZHQ    Hongqi Watch Factory/Hudie Watch Factory (Xian)*

ZHZ    Hangzhou Watch Factory

ZJH    Shanghai Watch Factory

ZJL     Jilin Watch Factory

ZJN    Jinan Clock & Watch Factory

ZJS     Shijiazhuang Watch Factory

ZJSH  Shanghai Watch Factory

ZJX     Jiaxing Watch Factory

ZKM   Kunming Watch Factory

ZLC     Liaocheng Watch Factory

ZLN    Liaoning Watch Factory

ZLY     Luoyang Watch Factory

ZNC    Nanchang Watch Factory

ZNE    Nanjing No. 2 Watch Factory

ZNN   Nanning Watch Factory

ZNS   Zhengzhou Watch Factory

ZQD   Qingdao Watch Factory

ZQH   Yangzhou Watch Factory

ZSE    Shanghai No. 2 Watch Factory

ZSH   Shanghai Watch Factory

ZSY    Shenyang Watch Factory

ZSZ    Suzhou Watch Factory

ZTZ    Tianjin Watch and Clock Factory

ZWD   Wuhan Watch Factory

ZWH   Wuhan Watch Factory

ZWX   Wuxi Watch Factory

ZXZ    Xuzhou Watch Factory

ZYH   Nanjing No. 2 Watch Factory

ZYQ   Yangquan Watch Factory

ZYT   Yantai Watch Factory

ZZZ   Zhengzhou Watch Factory


Notes on codes with an asterisk (*)


AH 2J2: Found on movements in watches from both factories, but it is unknown which was responsible for its manufacture.

B: the Shanghai B movement, a joint venture by Shanghai Watch Factory and Shanghai No. 4 Watch Factory. Also see SM.

JHB: A simplified tongji found in Yinling brand watches produced by both factories, but it is unknown which was responsible for its manufacture.

SB: Found on some non-tongji Beijing movements, and on early Suzhou movements. Also is seen as the first two letters of some Shanghai Watch Factory/Shanghai No. 4 Watch Factory movements. See B.

SD-2: The factory changed its name.

SHI: Every source I’ve seen refers to marks on early Yanan watches as SHI, but conventions of the time suggest that it could be SH1, similar to SS1, ST5, SB5, SM1, SG3 etc.

SM: Shanghai Stopwatch Factory changed its name to Shanghai No. 4 Watch Factory in 1978, which in turn changed its name to Shanghai Diamond Watch Factory in 1986.

SS: Jie Fang watches, produced by Shanghai No. 2 Watch Factory, have movements marked SS1. Were the movements manufactured there or at Shanghai Watch Factory?

SZB: Seen on some Beijing Watch Factory movements and some Bengbu Watch Factory casebacks.

SZH: Seen on movements in Hongmei brand watches from Wuxi Clock and Watch Factory, but its origin is unclear.

ZB: Seen on some Beijing Watch Factory movements and some Bengbu Watch Factory casebacks.

ZHQ: The factory changed its name.





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