Seiko Astron
1969 Astron 35SQ was the world's first commercially available quartz wristwatch; revived in 2012 as the GPS Solar line that syncs time zones from satellites.
4 references
“Differs” marks a spec with different recorded values. — means not recorded.
| Spec | 35SQ original quartz Astron | SAST001 Astron GPS Solar debut limited edition | SSE003J1 GPS Solar dual-time | SSH109J1 Astron 50th Anniversary Origin |
|---|---|---|---|---|
| Case size Differs | 36 mm | 47 mm | 44.6 mm | 42.9 mm |
| Thickness | 11 mm | Not recorded | Not recorded | Not recorded |
| Case Differs | 18k yellow gold, round | titanium with hard coating, round | titanium, round | titanium, round |
| Bezel | Not recorded | ceramic fixed | Not recorded | Not recorded |
| Crystal Differs | mineral | sapphire | sapphire | sapphire |
| Water resistance | Not recorded | 100 m | 100 m | 100 m |
| Caliber Differs | 35A | 7X52 | 8X82 | 5X53 |
| Movement maker Differs | Suwa Seikosha | Seiko | Seiko | Seiko |
| Movement type Differs | Quartz | Solar | Solar | Solar |
| Jewels | 8 | Not recorded | Not recorded | Not recorded |
| Complications Differs | date | date, world_time | date, gmt | date, gmt |
| Dial Differs | silver | Not recorded | black | blue |
| Produced Differs | 1969–1969 | 2012–2012 | 2015–2019 | 2019–2019 |
| Limited edition Differs | Not recorded | 2,500 pieces worldwide | Not recorded | 50th-anniversary run commemorating the 1969 35SQ |