History of 570 (No. 24)

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  • 1 (2021-01-16 (Sat) 09:25:47)
  • 2 (2021-01-30 (Sat) 10:47:08)
  • 3 (2021-01-30 (Sat) 12:20:21)
  • 4 (2021-02-04 (Thu) 22:52:18)
  • 5 (2021-02-20 (Sat) 14:30:12)
  • 6 (2022-09-18 (Sun) 20:44:15)
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  • 8 (2022-09-19 (Mon) 06:24:03)
  • 9 (2022-09-19 (Mon) 12:54:00)
  • 10 (2022-09-22 (Thu) 21:15:27)
  • 11 (2022-10-01 (Sat) 21:01:48)
  • 12 (2022-10-01 (Sat) 21:06:18)
  • 13 (2022-10-02 (Sun) 11:16:18)
  • 14 (2022-10-03 (Mon) 20:34:17)
  • 15 (2022-10-03 (Mon) 21:24:41)
  • 16 (2023-04-09 (Sun) 21:16:26)
  • 17 (2023-04-12 (Wed) 21:32:49)
  • 18 (2023-04-21 (Fri) 21:19:28)
  • 19 (2023-07-14 (Fri) 21:12:21)
  • 20 (2023-07-16 (Sun) 12:43:16)
  • 21 (2023-07-21 (Fri) 22:00:51)
  • 22 (2023-07-22 (Sat) 21:40:04)
  • 23 (2023-07-23 (Sun) 16:34:48)
  • 24 (2023-07-25 (Tue) 20:45:11)
  • 25 (2023-07-26 (Wed) 10:52:43)
  • 26 (2023-07-26 (Wed) 20:58:26)
  • 27 (2023-07-27 (Thu) 06:56:48)
  • 28 (2023-07-30 (Sun) 14:07:26)
  • 29 (2023-08-06 (Sun) 21:33:31)
  • 30 (2023-08-09 (Wed) 21:04:31)
  • 31 (2023-08-10 (Thu) 08:35:07)
  • 32 (2023-08-11 (Fri) 11:15:13)
  • 33 (2023-10-01 (Sun) 21:49:14)
  • 34 (2023-11-11 (Sat) 23:25:08)
  • 35 (2023-11-12 (Sun) 13:33:03)
  • 36 (2023-11-13 (Mon) 23:05:27)
  • 37 (2023-11-14 (Tue) 23:41:44)
  • 38 (2023-11-16 (Thu) 08:02:54)
  • 39 (2023-11-17 (Fri) 20:32:48)
  • 40 (2023-11-20 (Mon) 23:11:57)
  • 41 (2023-11-22 (Wed) 08:56:44)
  • 42 (2023-11-22 (Wed) 23:20:17)
  • 43 (2023-11-23 (Thu) 08:55:26)
  • 44 (2023-12-03 (Sun) 18:57:42)
  • 45 (2023-12-03 (Sun) 23:40:36)
  • 46 (2023-12-04 (Mon) 14:53:28)
  • 47 (2023-12-04 (Mon) 16:29:14)
  • 48 (2023-12-05 (Tue) 23:05:34)
  • 49 (2023-12-06 (Wed) 23:33:29)
  • 50 (2023-12-07 (Thu) 23:10:26)
  • 51 (2024-01-29 (Mon) 23:22:42)
  • 52 (2024-02-04 (Sun) 11:54:36)
  • 53 (2024-04-17 (Wed) 21:14:05)
  • 54 (2024-12-04 (Wed) 23:05:02)
  • 55 (2024-12-08 (Sun) 12:46:05)
  • 56 (2024-12-08 (Sun) 12:55:13)
  • 57 (2025-03-15 (Sat) 23:39:47)
  • 58 (2025-03-20 (Thu) 21:36:02)
  • 59 (2025-04-25 (Fri) 07:54:02)
  • 60 (2025-06-24 (Tue) 17:49:02)

---

Quartz movement

• Introduced circa 1974
• White ceramic circuit, often marked “4”, "5”, "AA3", "AI3", “AK2", "AK3”, “AR3”, "AO4", "AA5", "AB5", "AH5", "AI5", "AL5", "AR5", "AS5"
• RCA 81473 LSI chip, date code in the form of xxxx, eg 7422 for 22nd week of 1974
• 10 Jewels
• Some are marked "Three 3 Adj."
• Some even have a movement serial number
• Battery 303
• Consumption 15 or 3 micro amps
• Some have a square to adjust rate & some a screwdriver slot
• Some have a shock proof setting on the rotor pivot
• Some have a large oval quartz can, some have a large cylinder
• Some have a more red coloured insulation on the coil

From thewatchforum.co.uk

"The first volume movement was the cal570, a conventional looking quartz movement, well executed and rather similar to its contemporary Orient cal52950 - perhaps a sign of cooperation or plagiarism between the two companies. Watches with this movement date from the start of 1974 to perhaps 1976."

http://hiiragi15.blog.fc2.com/blog-entry-3085.html

http://hiiragi15.blog.fc2.com/blog-entry-3086.html

http://www.crazywatches.pl/ricoh-570-dugena-riquartz-1974

Watches using this calibre†

• See List of watches

Example serial numbers†

570 movement serial numbers seem to be rare.

• 010856 (Cover of Technical manual), cylinder quartz, square adj
• 011813 570001, oval quartz
• Most movements do not have a serial number

Date code?†

570A†

• Fixed cap jewels instead of shockproof
• Oval quartz crystal can, attached to wheel bridge

571 & 572†

• Consumption 11 or 3 micro amps

     

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