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Remarks: The 13 ligne MST 175 was the second ROAMER wrist
watch calibre being a redesign of the prior 13 Ligne calibre (setting works,
motion works and bridge layout).
It features a jeweled Swiss lever, three finger
train bridge and later a non-magnetic hairspring. The 175 was a
cut above the other small contemporary MST production calibres,
and many later calibres, 264, 352, and the 364 bear a striking
family resemblance - so in many ways the MST 175 is the
grandfather of designs in use until the late 1960s. The MST
175 was introduced in 1918 (confirmed by case hallmarks) and it
would appear it was superceeded by the 264 in later 1928. Few parts
are interchangeable with other MST calibres, except for some train
parts of the rarer 13 Ligne calibre.
Interestingly
non-magnetic versions of the MST 175 were produced from 1927,
debunking the Tissot claim for the first non-magnetic wrist watch in 1929. |
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| Production period: 1918-28 |
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| Jewels: | 6, 7, 13 or 15 | | Beat: | 18000 | | Winding: | manual | | Manufacturer: | MST |
| | Hand sizes: | | Hour: | 150 | | Minute: | 90 | | Second: | 19 | | | | | Stem tap size: | 120 |
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| Variant: | | | MST 175 | 13''' (28.9mm) sub second, 3 finger bridge |
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| Common parts/Interchange |
| Balance Staff: | | MST part number: | 7453, | interchanges with MST: | none |
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| Mainspring: | | MST part number: | 1240, GR4575 | interchanges with MST: | 13 | | Strength: | 0.135 | | Height: | 1.60 | | Length: | 300 |
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| Watches in my collection with the MST175: |
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