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| MST | 253, | 277 | | Ligne | 10.5''' | 10.5''' |
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 |  | | Cal. MST 253 | Cal. MST 277 |
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| Remarks: An unusal 10.5 ligne movement in terms of barrel bridge layout. Shares balance, lever, escape, mainsping and many other parts with the MST202. Not considered a variation of the MST202 family as the train gears differ. MST 253 was listed as obsolete in 1933, the 277 was not, probably the 277 was a replacement for the 253. |
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| Production period: 1925-1932 (253), 1933- (277) |
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| Jewels: | 6, 13 or 15 | | Beat: | 18000 | | Winding: | manual | | Manufacturer: | MST |
| | Hand sizes: | | Hour: | 150 | | Minute: | 80 | | Second: | 19 | | | | | Stem tap size: | 90 |
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| Variant: | | | MST 253 | 10.5''' (23.40mm) integral winding and barrel bridge | | MST 277 | 10.5''' (23.40mm) separate winding and barrel bridge |
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| Common parts/Interchange |
| Balance Staff: | | MST part number: | 7438, | interchanges with MST: | 202, 229, 242, 253, 271, 277, 303, 337 |
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| Mainspring: | | MST part number: | 1232 | interchanges with MST: | 202, 229, 242, 253, 271, 277, 303, 337 | | Strength: | 1.050 | | Height: | 1.45 | | Length: | 250 |
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| Watches in my collection with the MST253: |
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