| Brand: | Credor, Seiko, Shizukuishi Watch Studio | 
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|---|---|---|---|
| Family: | |||
| Height: | |||
| Jewels: | 26 | ||
| Reserve: | 50 hours | ||
| Frequency: | 28,800 A/h | ||
| Winding: | Automatic, Bi-Directional Automatic Winding, Seiko Magic Lever Winding | ||
| Diameter: | |||
| Complications: | Date, Hand Winding, Quick Date Correction | ||
| Hands: | Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00 | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Clockwise Balance Cock  Screw Regulator |
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| Production: – 2005 | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. 8L75 is an automatic watch movement with date produced by Seiko’s Shizukuichi Watch Studio for the Credor brand. It was based on the Grand Seiko Cal. 9S55 which was produced at the same time. The Prospex/Brightz Cal. 8L35 was similar but less refined.
Cal. 8L75 was only used in a few Credor models between 2000 and 2005:
- Credor Pacifique GCBR
- Credor Automatic GCBR
- Credor Phoenix Automatic GCBR
| Production | Application | Winding | Jewels | Notes | |
|---|---|---|---|---|---|
| 8L21 | 2003-2007 | Brightz SAGL | Automatic | 24 | Similar to 9S51 |
| 8L34 | 2000 | Railway pocket watch | Manual | 20 | Small seconds |
| 8L35 | 2000-present | Brightz SAGQ Prospex SBDX Prospex SLA | Automatic | 26 | Date, similar to 9S55 |
| 8L36 | 2011-present | Credor GCBZ Galante SBLM | Automatic | 27 | GMT, similar to 9S56 |
| 8L38 | 2010-2015 | Galante SBLL | Automatic | 26 | Open Heart |
| 8L75 | -2005 | Credor GCBR | Automatic | 26 | Date, similar to 9S55 |
| 9S51 | 1998-2009 | GS SBGR | Automatic | 24 | No date |
| 9S54 | 2001-2010 | GS SBGW | Manual | 20 | No date |
| 9S55 | 1998-2010 | GS SBGR | Automatic | 26 | Date |
| 9S56 | 2002-2010 | GS SBGM | Automatic | 27 | GMT, no date |