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| Orient Watch Movements |
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Update January 13, 2010
This is the beginning of my Orient watch movement database. I have the key to deciphering the markings on Orient watches, and I should now be able to identify the various calibers by their functions and layout. I still need information from you to grow this database. Please send me your Orient watch information. I need the following for my project: The markings on the case back, the functions of the watch and the dial layout, and the number marked on the rotor. Thank you for your help! Click here to email your watch info to me.
I'd like to offer a very special thank you to Mr. Haruo Saito of the Orient Watch Co., who provided me with much of the information on this page. He took a great deal of time and effort to help this watch collector. Thank you so much!
If you see any errors in the database, or have additional information in Orient Watch movements, please email with corrections or information.
Calibers with a blue background are not verified.
Click on the linked caliber numbers for more information on that movement.
Many of the movements now have instructions from the Orient manual. Click on the linked caliber numbers to check it out.
New! Some new calibers have been added, and I have received information that verifies that the calibers are referred to both by the 3-character number starting with 4, and by a 2-letter code. I've added the 2-letter codes where applicable.
| Caliber | Jewels | Seconds Indicator | Date Indicator | Click Button | Day Indicator | Power Reserve | World Time | 24hr Hand | AM/PM indicator | Auto or Hand Wind |
| 31942 | 21 | center seconds | window | yes - date | window | no | no | no | no | Auto |
| 429 | 27 | center seconds | window | yes - date | window | no | no | no | no | Auto |
| 4973 | 27 | center seconds | window | yes - ? | window | no | no | no | no | Auto |
| 468 | sub seconds @ 6:00 | no | no | no | @ 12:00 | no | no | no | Auto | |
| 469 or EM | 17 or 21 | center seconds | window | yes - day | window | no | no | no | no | Auto |
| 469 (Variant) | 17 or 21 | center seconds | window | yes - day | Pointer @ 6:00 | no | no | no | no | Auto |
| 487 or ER | 21 | center seconds | window | no | no | no | no | no | no | Auto |
| 558 or NP | 21 | center seconds | window | yes - day | window | no | no | no | no | HW |
| 559 or NQ | 21 | center seconds | window | yes - day | window | no | no | no | no | HW |
| 557 or NR | 21 | center seconds | window | no | no | no | no | no | no | HW |
| 597 or PF | 21 | center seconds | window | no | no | no | no | no | no | HW |
| 599 or PM | 21 | center seconds | window | yes - day | window | no | no | no | no | HW |
| 46A or DB | 21 | center seconds | no | no | no | no | no | no | no | Auto |
| 46B or ET | 21 | center seconds | window | no | pointer @ 3:00 | no | no | subdial @ 10 | no | Auto |
| 46C or ES | 21 | center seconds | window | no | Pointer @ 3:00 | no | no | subdial @ 10 | no | Auto |
| 46D or EU | 21 | center seconds | window | no | no | no | no | no | no | Auto |
| 46E or EV | 21 | center seconds | window | no | full day window | no | no | no | no | Auto |
| 46F or EW | 21 | center seconds | no | no | no | no | no | no | no | Auto |
| 46G or EX | 21 | center seconds | window | yes - date | no | @ 12:00 | no | no | no | Auto |
| 46H or EY | 23 | sub seconds @ 6:00 | pointer @ 9:00 | no | no | @ 12:00 | yes | no | no | Auto |
| 46J or EZ | 23 | sub seconds @ 6:00 | pointer @ 9:00 | no | no | @ 12:00 | no | no | no | Auto |
| 46K or FA | 21 | center seconds | pointer @ 6:00 | no | no | @ 12:00 | yes | no | no | Auto |
| 46L or FB | 21 | center seconds, hacking | pointer @ 9:00 | no | no | @ 12:00 | yes | no | no | Auto |
| 46M or FC | 21 | center seconds - hacking | window | no | no | @ 12:00 | no | no | no | Auto |
| 46N or FD | 21 | center seconds | window | no | no | @ 12:00 | no | no | no | Auto |
| 46P or FE | 21 | center seconds | window | no | no | no | no | yes | no | Auto |
| 46R or FT | 21 | center seconds | no | no | no | yes | no | no | no | Auto |
| 46S or FH | 23 | sub seconds @ 6:00 | no | no | no | @ 12:00 | no | no | no | Auto |
| 46U or FM | 21 | center seconds | pointer @ 6:00 | no | no | @ 12:00 | no | no | no | Auto |
| 46V or FN | 21 | center seconds | window | day/am/pm | window | no | no | no | window | Auto |
| 46W or FP | 21 | center seconds | window | yes - day | dots | no | no | no | no | Auto |
| 46X or FR | 23 | sub seconds @ 6:00 | no | no | no | @ 12:00 | no | no | no | Auto |
| 46Y or FX | 21 | center seconds | window | yes | no | no | no | no | no | Auto |
| 40S | 22 | center seconds | window | yes - day | no | @ 12:00 | no | no | no | Auto |
| 48K or DH | 21 | hacking | pointer @ 6:00 | no | no | @ 12:00 | yes | no | no | Auto |
Orient Watch Grades
The two letters found on the case and dial of each Orient watch designate the movement, which is graded for accuracy. There seem to be only three major grades. This info is from a 2001 catalog. Thanks to Adriano from SCWF, who posted this info.
FC, EG : +10~-5 sec / day
FA, EX, FE, ER, EM : +25~-15 sec / day
PF, NR : +40~-30 sec / day