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First quartz watch: Astron released 25 Dec 1969 calibre 35 with hand soldered hybrid integrated circuit featuring 76 transistors and 84 resistors 29 capacitors total 189 elements onto a ceramic substrate.
First true production quartz watch calibre 3800 series 1971 with in house CMOS IC. Prototype finished April 1971, first watches shipped Nov 1971, 3823 released Dec 1971.
Earliest watch I've seen dated May 1971, latest 1978 (both 3823)
Regarding John Hall. At Intersil, Hoerni, a Swiss native, received venture funding from Swiss watchmaker Omega to develop a wristwatch IC. Though Hoerni and Hall created a successful design, Omega decided not to put it into production. Hoerni went to Japan and received an order for the watch chips from Seiko Chairman Shoji Hattori. Seiko used these chips to create the world's first quartz watch, the “Astron”, in 1969. Hattori, recognizing the potential of this design and future ones, funded Hall's start-up company, Micro Power Systems (MPS), in 1971.
Eight models
| Ref | Case | Dial | Notes |
| 3800 | One model two dials | ||
| -7030 | 7030 | ||
| 7120 | |||
| 3802 | Nine models | ||
| -7000 | Silvered | ||
| -7010 | 7010 | ||
| 7020 | |||
| -7020 | 7030 Silvered | Jun 73 | |
| 7040 | |||
| -7021 | 7030 Silvered | Seems same as above | |
| 7040 | |||
| -7030 | 7030 | ||
| 7120 Snowflake arabic numerals | |||
| -7031 | One piece | 7030 Silvered | Jul 74 |
| Snowflake Arabic | |||
| -7060 | Snowflake | ||
| -7070 | One piece | Silvered QT | |
| -7110 | Silvered QT | ||
| Blue | |||
| 3803 | |||
| -5010 | Green | ||
| -7010 | One piece | Silvered | Feb 73 |
| -7020 | Silvered | Oct 72 Feb 73 | |
| Gray | |||
| -7050 | Silvered | May 73 | |
| -7050 | Black linen | Seems same as -7020. Aug 72 | |
| -7060 | Snowflake | ||
| -7061 | Blue | Faceted crystal | |
| -7070 | Striped blue | Apr 73 Italy | |
| -7080 | Octagonal | Silvered | |
| Green | |||
| Blue | |||
| -7090 | One piece | Silvered | Jan 74 Jun 74 |
| Brown QT | |||
| -7110 | Blue QT | ||
| -8000-G | Silvered QT | ||
| Blue QT | |||
| 3819 | GMT | One model | |
| -7000 | |||
| 3823 | VFA | 5 models | |
| -5010 | 18K gold | Gilt | |
| -7000 | One piece | White-cream Non VFA | |
| Blue | Non VFA May 71- | ||
| White-cream VFA | |||
| -7001 | One piece | Silvered | VFA plain & faceted |
| Snowflake VFA Roman | |||
| -7030 | White gold | ||
| -7040 | |||
| 3862 | |||
| -5010 | Silvered QR | ||
| Blue QR | |||
| -7000 | Silvered | ||
| -7001 | Silvered | ||
| -7010 | Silvered QR | ||
| Blue QR | |||
| -7020 | Silvered QR | ||
| -8000 | Blue green QR | ||
| 3863 | |||
| -5009 | Silvered | ||
| Blue | |||
| -7000 | Blue | ||
| -7010 | Silvered QR | ||
| Black w Roman numerals QR | |||
| Green QR | |||
| -7020 | Green & gold QR | Faceted | |
| Blue | Faceted | ||
| -7039 | Silvered | ||
| -7049 | Blue 3003 | ||
| -7059 | Silvered 3003 | ||
| -8000 | Silvered QR | ||
| Blue QR | |||
| 3883 | Superior | One model | |
| -7000 | Silvered | ||
| Green |
