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| MST | 436, | 437 | | Ligne | 12''' | 12''' |
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 |  |  | | Cal. 436 | Cal. 437 | Cal. 436, 437 |
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| Remarks: A revolutionary 100% in house design and manufacture. Meyer and Stuedeli SA (MST) third in-house automatic. This calibre along with the 471 successor was the pinnacle of MST movement design. Differential gearing, 44 functional jewels and beautifully finished - this world class movement was many years ahead of the competition. Micro regulator as standard. Jewels in the 44 jewel version were allocated as follows: Movement 19, automatic winding device 8 (hole jewels), coupling clutches (2x5) 10 ruby balls, and ball bearing for rotor 7 ruby balls. Development took considerable time and demand for an automatic with date was a problem, the MST441/452 (a modified Felsa 4002/4007) was introduced as a stopgap. |
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| Production period:
1963-1966
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| Jewels: | 44 | | Beat: | 21600 | | Winding: | automatic | | Manufacturer: | MST |
| | Hand sizes: | | Hour: | 150 | | Minute: | 90 | | Second: | 20 | | | | | Stem tap size: | 90 |
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| Variant: | | | MST 436 | 12''' (26mm) direct sweep seconds | | MST 437 | 12''' (26mm) direct sweep seconds, date |
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| Common parts/Interchange |
| Balance Staff: | | MST part number: | 7513, | interchanges with MST: | 436, 437, 470, 471 |
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| Mainspring: | | MST part number: | 1265 | interchanges with MST: | 436, 437, 470, 471 | | Strength: | 0.10 | | Height: | 1.40 | | Length: | 290 |
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| Watches in my collection with the MST436: |
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| Watches in my collection with the MST437: |
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